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Finding the Fourth Proportional to 528,957.66, 729,967.51 and 287,243.10

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Solution

The fourth proportional to 528,957.66, 729,967.51 and 287,243.10 is: 396,398.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,957.66 : 729,967.51 = 287,243.10 : x
  2. Step 2: Convert to fraction form
    528,957.66/729,967.51 = 287,243.10/x
  3. Step 3: Cross multiply
    528,957.66x = 729,967.51 × 287,243.10
  4. Step 4: Simplify right side
    528,957.66x = 209,678,130,471.68
  5. Step 5: Solve for x
    x = 209,678,130,471.68/528,957.66
  6. Step 6: Final answer
    x = 396,398.70

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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.