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Finding the Fourth Proportional to 426,197.80, 639,296.70 and 248,613.40

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Solution

The fourth proportional to 426,197.80, 639,296.70 and 248,613.40 is: 372,920.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,197.80 : 639,296.70 = 248,613.40 : x
  2. Step 2: Convert to fraction form
    426,197.80/639,296.70 = 248,613.40/x
  3. Step 3: Cross multiply
    426,197.80x = 639,296.70 × 248,613.40
  4. Step 4: Simplify right side
    426,197.80x = 158,937,726,195.78
  5. Step 5: Solve for x
    x = 158,937,726,195.78/426,197.80
  6. Step 6: Final answer
    x = 372,920.10

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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.