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Finding the Fourth Proportional to 528,999.32, 730,032 and 287,292.08

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Solution

The fourth proportional to 528,999.32, 730,032 and 287,292.08 is: 396,470.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,999.32 : 730,032 = 287,292.08 : x
  2. Step 2: Convert to fraction form
    528,999.32/730,032 = 287,292.08/x
  3. Step 3: Cross multiply
    528,999.32x = 730,032 × 287,292.08
  4. Step 4: Simplify right side
    528,999.32x = 209,732,411,746.56
  5. Step 5: Solve for x
    x = 209,732,411,746.56/528,999.32
  6. Step 6: Final answer
    x = 396,470.10

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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.