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Finding the Fourth Proportional to 529.03, 729.91 and 307.90

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Solution

The fourth proportional to 529.03, 729.91 and 307.90 is: 424.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.03 : 729.91 = 307.90 : x
  2. Step 2: Convert to fraction form
    529.03/729.91 = 307.90/x
  3. Step 3: Cross multiply
    529.03x = 729.91 × 307.90
  4. Step 4: Simplify right side
    529.03x = 224,740.59
  5. Step 5: Solve for x
    x = 224,740.59/529.03
  6. Step 6: Final answer
    x = 424.82

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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.