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Finding the Fourth Proportional to 887,999.60, 1,331,999.40 and 806,643.20

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Solution

The fourth proportional to 887,999.60, 1,331,999.40 and 806,643.20 is: 1,209,964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,999.60 : 1,331,999.40 = 806,643.20 : x
  2. Step 2: Convert to fraction form
    887,999.60/1,331,999.40 = 806,643.20/x
  3. Step 3: Cross multiply
    887,999.60x = 1,331,999.40 × 806,643.20
  4. Step 4: Simplify right side
    887,999.60x = 1,074,448,258,414.08
  5. Step 5: Solve for x
    x = 1,074,448,258,414.08/887,999.60
  6. Step 6: Final answer
    x = 1,209,964.80

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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.