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Finding the Fourth Proportional to 887,990.64, 1,225,402.20 and 485,574

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Solution

The fourth proportional to 887,990.64, 1,225,402.20 and 485,574 is: 670,078.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,990.64 : 1,225,402.20 = 485,574 : x
  2. Step 2: Convert to fraction form
    887,990.64/1,225,402.20 = 485,574/x
  3. Step 3: Cross multiply
    887,990.64x = 1,225,402.20 × 485,574
  4. Step 4: Simplify right side
    887,990.64x = 595,023,447,862.80
  5. Step 5: Solve for x
    x = 595,023,447,862.80/887,990.64
  6. Step 6: Final answer
    x = 670,078.51

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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.