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Finding the Fourth Proportional to 503,750.20, 755,625.30 and 438,140.20

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Solution

The fourth proportional to 503,750.20, 755,625.30 and 438,140.20 is: 657,210.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,750.20 : 755,625.30 = 438,140.20 : x
  2. Step 2: Convert to fraction form
    503,750.20/755,625.30 = 438,140.20/x
  3. Step 3: Cross multiply
    503,750.20x = 755,625.30 × 438,140.20
  4. Step 4: Simplify right side
    503,750.20x = 331,069,820,067.06
  5. Step 5: Solve for x
    x = 331,069,820,067.06/503,750.20
  6. Step 6: Final answer
    x = 657,210.30

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Double scale
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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.