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Finding the Fourth Proportional to 503,721.70, 755,582.55 and 438,111.70

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Solution

The fourth proportional to 503,721.70, 755,582.55 and 438,111.70 is: 657,167.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,721.70 : 755,582.55 = 438,111.70 : x
  2. Step 2: Convert to fraction form
    503,721.70/755,582.55 = 438,111.70/x
  3. Step 3: Cross multiply
    503,721.70x = 755,582.55 × 438,111.70
  4. Step 4: Simplify right side
    503,721.70x = 331,029,555,470.84
  5. Step 5: Solve for x
    x = 331,029,555,470.84/503,721.70
  6. Step 6: Final answer
    x = 657,167.55

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Half scale
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Double scale
Find fourth proportional to 503,722.70, 755,584.05 and 438,112.70
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.