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Finding the Fourth Proportional to 876,387, 1,209,414.06 and 473,979

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Solution

The fourth proportional to 876,387, 1,209,414.06 and 473,979 is: 654,091.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,387 : 1,209,414.06 = 473,979 : x
  2. Step 2: Convert to fraction form
    876,387/1,209,414.06 = 473,979/x
  3. Step 3: Cross multiply
    876,387x = 1,209,414.06 × 473,979
  4. Step 4: Simplify right side
    876,387x = 573,236,866,744.74
  5. Step 5: Solve for x
    x = 573,236,866,744.74/876,387
  6. Step 6: Final answer
    x = 654,091.02

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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.