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Finding the Fourth Proportional to 386,980.80, 580,471.20 and 292,502.40

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Solution

The fourth proportional to 386,980.80, 580,471.20 and 292,502.40 is: 438,753.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,980.80 : 580,471.20 = 292,502.40 : x
  2. Step 2: Convert to fraction form
    386,980.80/580,471.20 = 292,502.40/x
  3. Step 3: Cross multiply
    386,980.80x = 580,471.20 × 292,502.40
  4. Step 4: Simplify right side
    386,980.80x = 169,789,219,130.88
  5. Step 5: Solve for x
    x = 169,789,219,130.88/386,980.80
  6. Step 6: Final answer
    x = 438,753.60

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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.