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Finding the Fourth Proportional to 318,320.92, 477,358.65 and 140,730.46

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Solution

The fourth proportional to 318,320.92, 477,358.65 and 140,730.46 is: 211,041.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,320.92 : 477,358.65 = 140,730.46 : x
  2. Step 2: Convert to fraction form
    318,320.92/477,358.65 = 140,730.46/x
  3. Step 3: Cross multiply
    318,320.92x = 477,358.65 × 140,730.46
  4. Step 4: Simplify right side
    318,320.92x = 67,178,902,399.48
  5. Step 5: Solve for x
    x = 67,178,902,399.48/318,320.92
  6. Step 6: Final answer
    x = 211,041.43

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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.