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Finding the Fourth Proportional to 625,643.40, 938,465.10 and 359,922.90

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Solution

The fourth proportional to 625,643.40, 938,465.10 and 359,922.90 is: 539,884.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,643.40 : 938,465.10 = 359,922.90 : x
  2. Step 2: Convert to fraction form
    625,643.40/938,465.10 = 359,922.90/x
  3. Step 3: Cross multiply
    625,643.40x = 938,465.10 × 359,922.90
  4. Step 4: Simplify right side
    625,643.40x = 337,775,080,340.79
  5. Step 5: Solve for x
    x = 337,775,080,340.79/625,643.40
  6. Step 6: Final answer
    x = 539,884.35

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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.