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Finding the Fourth Proportional to 251,646.80, 377,470.20 and 139,672.40

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Solution

The fourth proportional to 251,646.80, 377,470.20 and 139,672.40 is: 209,508.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,646.80 : 377,470.20 = 139,672.40 : x
  2. Step 2: Convert to fraction form
    251,646.80/377,470.20 = 139,672.40/x
  3. Step 3: Cross multiply
    251,646.80x = 377,470.20 × 139,672.40
  4. Step 4: Simplify right side
    251,646.80x = 52,722,168,762.48
  5. Step 5: Solve for x
    x = 52,722,168,762.48/251,646.80
  6. Step 6: Final answer
    x = 209,508.60

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1.5x scale

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.