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Finding the Fourth Proportional to 806,487.20, 1,209,730.80 and 717,840.80

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Solution

The fourth proportional to 806,487.20, 1,209,730.80 and 717,840.80 is: 1,076,761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,487.20 : 1,209,730.80 = 717,840.80 : x
  2. Step 2: Convert to fraction form
    806,487.20/1,209,730.80 = 717,840.80/x
  3. Step 3: Cross multiply
    806,487.20x = 1,209,730.80 × 717,840.80
  4. Step 4: Simplify right side
    806,487.20x = 868,394,125,256.64
  5. Step 5: Solve for x
    x = 868,394,125,256.64/806,487.20
  6. Step 6: Final answer
    x = 1,076,761.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.