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Finding the Fourth Proportional to 529.07, 728.51 and 469.20

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Solution

The fourth proportional to 529.07, 728.51 and 469.20 is: 646.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.07 : 728.51 = 469.20 : x
  2. Step 2: Convert to fraction form
    529.07/728.51 = 469.20/x
  3. Step 3: Cross multiply
    529.07x = 728.51 × 469.20
  4. Step 4: Simplify right side
    529.07x = 341,818.07
  5. Step 5: Solve for x
    x = 341,818.07/529.07
  6. Step 6: Final answer
    x = 646.07

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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.