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Finding the Fourth Proportional to 439,690.73, 658,811.65 and 402,921.79

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Solution

The fourth proportional to 439,690.73, 658,811.65 and 402,921.79 is: 603,718.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,690.73 : 658,811.65 = 402,921.79 : x
  2. Step 2: Convert to fraction form
    439,690.73/658,811.65 = 402,921.79/x
  3. Step 3: Cross multiply
    439,690.73x = 658,811.65 × 402,921.79
  4. Step 4: Simplify right side
    439,690.73x = 265,449,572,231.03
  5. Step 5: Solve for x
    x = 265,449,572,231.03/439,690.73
  6. Step 6: Final answer
    x = 603,718.83

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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.