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Finding the Fourth Proportional to 578,085.80, 867,128.70 and 329,253.80

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Solution

The fourth proportional to 578,085.80, 867,128.70 and 329,253.80 is: 493,880.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,085.80 : 867,128.70 = 329,253.80 : x
  2. Step 2: Convert to fraction form
    578,085.80/867,128.70 = 329,253.80/x
  3. Step 3: Cross multiply
    578,085.80x = 867,128.70 × 329,253.80
  4. Step 4: Simplify right side
    578,085.80x = 285,505,419,564.06
  5. Step 5: Solve for x
    x = 285,505,419,564.06/578,085.80
  6. Step 6: Final answer
    x = 493,880.70

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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.