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Finding the Fourth Proportional to 667,502.92, 921,135.04 and 391,856.34

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Solution

The fourth proportional to 667,502.92, 921,135.04 and 391,856.34 is: 540,750.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,502.92 : 921,135.04 = 391,856.34 : x
  2. Step 2: Convert to fraction form
    667,502.92/921,135.04 = 391,856.34/x
  3. Step 3: Cross multiply
    667,502.92x = 921,135.04 × 391,856.34
  4. Step 4: Simplify right side
    667,502.92x = 360,952,602,713.39
  5. Step 5: Solve for x
    x = 360,952,602,713.39/667,502.92
  6. Step 6: Final answer
    x = 540,750.60

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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.