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Finding the Fourth Proportional to 528,827.52, 729,762.05 and 287,104.86

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Solution

The fourth proportional to 528,827.52, 729,762.05 and 287,104.86 is: 396,193.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,827.52 : 729,762.05 = 287,104.86 : x
  2. Step 2: Convert to fraction form
    528,827.52/729,762.05 = 287,104.86/x
  3. Step 3: Cross multiply
    528,827.52x = 729,762.05 × 287,104.86
  4. Step 4: Simplify right side
    528,827.52x = 209,518,229,763.04
  5. Step 5: Solve for x
    x = 209,518,229,763.04/528,827.52
  6. Step 6: Final answer
    x = 396,193.89

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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.