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Finding the Fourth Proportional to 528.60, 729.65 and 307.55

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Solution

The fourth proportional to 528.60, 729.65 and 307.55 is: 424.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.60 : 729.65 = 307.55 : x
  2. Step 2: Convert to fraction form
    528.60/729.65 = 307.55/x
  3. Step 3: Cross multiply
    528.60x = 729.65 × 307.55
  4. Step 4: Simplify right side
    528.60x = 224,403.10
  5. Step 5: Solve for x
    x = 224,403.10/528.60
  6. Step 6: Final answer
    x = 424.53

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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.