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Finding the Fourth Proportional to 317,909.80, 476,475.90 and 140,228.20

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Solution

The fourth proportional to 317,909.80, 476,475.90 and 140,228.20 is: 210,170.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,909.80 : 476,475.90 = 140,228.20 : x
  2. Step 2: Convert to fraction form
    317,909.80/476,475.90 = 140,228.20/x
  3. Step 3: Cross multiply
    317,909.80x = 476,475.90 × 140,228.20
  4. Step 4: Simplify right side
    317,909.80x = 66,815,357,800.38
  5. Step 5: Solve for x
    x = 66,815,357,800.38/317,909.80
  6. Step 6: Final answer
    x = 210,170.80

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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.