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Finding the Fourth Proportional to 261,657.60, 391,708.80 and 156,422.40

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Solution

The fourth proportional to 261,657.60, 391,708.80 and 156,422.40 is: 234,168.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,657.60 : 391,708.80 = 156,422.40 : x
  2. Step 2: Convert to fraction form
    261,657.60/391,708.80 = 156,422.40/x
  3. Step 3: Cross multiply
    261,657.60x = 391,708.80 × 156,422.40
  4. Step 4: Simplify right side
    261,657.60x = 61,272,030,597.12
  5. Step 5: Solve for x
    x = 61,272,030,597.12/261,657.60
  6. Step 6: Final answer
    x = 234,168.74

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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.