Home / 781,886.53-1,078,996.12-442,354.78

Finding the Fourth Proportional to 781,886.53, 1,078,996.12 and 442,354.78

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Solution

The fourth proportional to 781,886.53, 1,078,996.12 and 442,354.78 is: 610,445.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,886.53 : 1,078,996.12 = 442,354.78 : x
  2. Step 2: Convert to fraction form
    781,886.53/1,078,996.12 = 442,354.78/x
  3. Step 3: Cross multiply
    781,886.53x = 1,078,996.12 × 442,354.78
  4. Step 4: Simplify right side
    781,886.53x = 477,299,091,526.31
  5. Step 5: Solve for x
    x = 477,299,091,526.31/781,886.53
  6. Step 6: Final answer
    x = 610,445.47

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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.