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Finding the Fourth Proportional to 346,791.72, 478,380.96 and 282,330.30

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Solution

The fourth proportional to 346,791.72, 478,380.96 and 282,330.30 is: 389,459.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,791.72 : 478,380.96 = 282,330.30 : x
  2. Step 2: Convert to fraction form
    346,791.72/478,380.96 = 282,330.30/x
  3. Step 3: Cross multiply
    346,791.72x = 478,380.96 × 282,330.30
  4. Step 4: Simplify right side
    346,791.72x = 135,061,439,951.09
  5. Step 5: Solve for x
    x = 135,061,439,951.09/346,791.72
  6. Step 6: Final answer
    x = 389,459.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.