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Finding the Fourth Proportional to 439,718.15, 659,690.93 and 257,502.83

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Solution

The fourth proportional to 439,718.15, 659,690.93 and 257,502.83 is: 386,320.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,718.15 : 659,690.93 = 257,502.83 : x
  2. Step 2: Convert to fraction form
    439,718.15/659,690.93 = 257,502.83/x
  3. Step 3: Cross multiply
    439,718.15x = 659,690.93 × 257,502.83
  4. Step 4: Simplify right side
    439,718.15x = 169,872,281,400.33
  5. Step 5: Solve for x
    x = 169,872,281,400.33/439,718.15
  6. Step 6: Final answer
    x = 386,320.83

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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.