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Finding the Fourth Proportional to 812,915.76, 1,121,820.12 and 468,750

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Solution

The fourth proportional to 812,915.76, 1,121,820.12 and 468,750 is: 646,872.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,915.76 : 1,121,820.12 = 468,750 : x
  2. Step 2: Convert to fraction form
    812,915.76/1,121,820.12 = 468,750/x
  3. Step 3: Cross multiply
    812,915.76x = 1,121,820.12 × 468,750
  4. Step 4: Simplify right side
    812,915.76x = 525,853,181,250.00
  5. Step 5: Solve for x
    x = 525,853,181,250.00/812,915.76
  6. Step 6: Final answer
    x = 646,872.91

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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.