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Finding the Fourth Proportional to 529.29, 730.91 and 398.07

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Solution

The fourth proportional to 529.29, 730.91 and 398.07 is: 549.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.29 : 730.91 = 398.07 : x
  2. Step 2: Convert to fraction form
    529.29/730.91 = 398.07/x
  3. Step 3: Cross multiply
    529.29x = 730.91 × 398.07
  4. Step 4: Simplify right side
    529.29x = 290,953.34
  5. Step 5: Solve for x
    x = 290,953.34/529.29
  6. Step 6: Final answer
    x = 549.70

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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.