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Finding the Fourth Proportional to 305,663.79, 458,348.20 and 128,123.13

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Solution

The fourth proportional to 305,663.79, 458,348.20 and 128,123.13 is: 192,122.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,663.79 : 458,348.20 = 128,123.13 : x
  2. Step 2: Convert to fraction form
    305,663.79/458,348.20 = 128,123.13/x
  3. Step 3: Cross multiply
    305,663.79x = 458,348.20 × 128,123.13
  4. Step 4: Simplify right side
    305,663.79x = 58,725,006,013.87
  5. Step 5: Solve for x
    x = 58,725,006,013.87/305,663.79
  6. Step 6: Final answer
    x = 192,122.87

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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.