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Finding the Fourth Proportional to 625,615.80, 938,423.70 and 388,836.60

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Solution

The fourth proportional to 625,615.80, 938,423.70 and 388,836.60 is: 583,254.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,615.80 : 938,423.70 = 388,836.60 : x
  2. Step 2: Convert to fraction form
    625,615.80/938,423.70 = 388,836.60/x
  3. Step 3: Cross multiply
    625,615.80x = 938,423.70 × 388,836.60
  4. Step 4: Simplify right side
    625,615.80x = 364,893,480,867.42
  5. Step 5: Solve for x
    x = 364,893,480,867.42/625,615.80
  6. Step 6: Final answer
    x = 583,254.90

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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.