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Finding the Fourth Proportional to 729.70, 1,006.53 and 434.75

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Solution

The fourth proportional to 729.70, 1,006.53 and 434.75 is: 599.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.70 : 1,006.53 = 434.75 : x
  2. Step 2: Convert to fraction form
    729.70/1,006.53 = 434.75/x
  3. Step 3: Cross multiply
    729.70x = 1,006.53 × 434.75
  4. Step 4: Simplify right side
    729.70x = 437,588.92
  5. Step 5: Solve for x
    x = 437,588.92/729.70
  6. Step 6: Final answer
    x = 599.68

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.