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Finding the Fourth Proportional to 456,279.40, 684,419.10 and 157,097.80

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Solution

The fourth proportional to 456,279.40, 684,419.10 and 157,097.80 is: 235,646.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,279.40 : 684,419.10 = 157,097.80 : x
  2. Step 2: Convert to fraction form
    456,279.40/684,419.10 = 157,097.80/x
  3. Step 3: Cross multiply
    456,279.40x = 684,419.10 × 157,097.80
  4. Step 4: Simplify right side
    456,279.40x = 107,520,734,887.98
  5. Step 5: Solve for x
    x = 107,520,734,887.98/456,279.40
  6. Step 6: Final answer
    x = 235,646.70

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Similar ratio
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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.