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Finding the Fourth Proportional to 478,878.56, 718,422.96 and 141,945.20

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Solution

The fourth proportional to 478,878.56, 718,422.96 and 141,945.20 is: 212,948.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,878.56 : 718,422.96 = 141,945.20 : x
  2. Step 2: Convert to fraction form
    478,878.56/718,422.96 = 141,945.20/x
  3. Step 3: Cross multiply
    478,878.56x = 718,422.96 × 141,945.20
  4. Step 4: Simplify right side
    478,878.56x = 101,976,690,741.79
  5. Step 5: Solve for x
    x = 101,976,690,741.79/478,878.56
  6. Step 6: Final answer
    x = 212,948.96

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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.