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Finding the Fourth Proportional to 512,920.80, 769,381.20 and 158,043.60

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Solution

The fourth proportional to 512,920.80, 769,381.20 and 158,043.60 is: 237,065.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,920.80 : 769,381.20 = 158,043.60 : x
  2. Step 2: Convert to fraction form
    512,920.80/769,381.20 = 158,043.60/x
  3. Step 3: Cross multiply
    512,920.80x = 769,381.20 × 158,043.60
  4. Step 4: Simplify right side
    512,920.80x = 121,595,774,620.32
  5. Step 5: Solve for x
    x = 121,595,774,620.32/512,920.80
  6. Step 6: Final answer
    x = 237,065.40

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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.