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Finding the Fourth Proportional to 439,637.60, 657,706.80 and 381,123.20

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Solution

The fourth proportional to 439,637.60, 657,706.80 and 381,123.20 is: 570,168.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,637.60 : 657,706.80 = 381,123.20 : x
  2. Step 2: Convert to fraction form
    439,637.60/657,706.80 = 381,123.20/x
  3. Step 3: Cross multiply
    439,637.60x = 657,706.80 × 381,123.20
  4. Step 4: Simplify right side
    439,637.60x = 250,667,320,277.76
  5. Step 5: Solve for x
    x = 250,667,320,277.76/439,637.60
  6. Step 6: Final answer
    x = 570,168.07

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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.