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Finding the Fourth Proportional to 318,901.70, 478,410.15 and 131,932.10

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Solution

The fourth proportional to 318,901.70, 478,410.15 and 131,932.10 is: 197,921.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,901.70 : 478,410.15 = 131,932.10 : x
  2. Step 2: Convert to fraction form
    318,901.70/478,410.15 = 131,932.10/x
  3. Step 3: Cross multiply
    318,901.70x = 478,410.15 × 131,932.10
  4. Step 4: Simplify right side
    318,901.70x = 63,117,655,750.82
  5. Step 5: Solve for x
    x = 63,117,655,750.82/318,901.70
  6. Step 6: Final answer
    x = 197,921.98

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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.