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Finding the Fourth Proportional to 318,288.56, 477,330.78 and 105,008.68

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Solution

The fourth proportional to 318,288.56, 477,330.78 and 105,008.68 is: 157,479.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,288.56 : 477,330.78 = 105,008.68 : x
  2. Step 2: Convert to fraction form
    318,288.56/477,330.78 = 105,008.68/x
  3. Step 3: Cross multiply
    318,288.56x = 477,330.78 × 105,008.68
  4. Step 4: Simplify right side
    318,288.56x = 50,123,875,131.17
  5. Step 5: Solve for x
    x = 50,123,875,131.17/318,288.56
  6. Step 6: Final answer
    x = 157,479.35

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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.