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Finding the Fourth Proportional to 318,471.68, 477,277.12 and 121,372.16

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Solution

The fourth proportional to 318,471.68, 477,277.12 and 121,372.16 is: 181,894.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,471.68 : 477,277.12 = 121,372.16 : x
  2. Step 2: Convert to fraction form
    318,471.68/477,277.12 = 121,372.16/x
  3. Step 3: Cross multiply
    318,471.68x = 477,277.12 × 121,372.16
  4. Step 4: Simplify right side
    318,471.68x = 57,928,154,972.98
  5. Step 5: Solve for x
    x = 57,928,154,972.98/318,471.68
  6. Step 6: Final answer
    x = 181,894.21

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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.