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Finding the Fourth Proportional to 317,920, 477,098.72 and 130,931.52

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Solution

The fourth proportional to 317,920, 477,098.72 and 130,931.52 is: 196,487.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,920 : 477,098.72 = 130,931.52 : x
  2. Step 2: Convert to fraction form
    317,920/477,098.72 = 130,931.52/x
  3. Step 3: Cross multiply
    317,920x = 477,098.72 × 130,931.52
  4. Step 4: Simplify right side
    317,920x = 62,467,260,599.65
  5. Step 5: Solve for x
    x = 62,467,260,599.65/317,920
  6. Step 6: Final answer
    x = 196,487.36

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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.