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Finding the Fourth Proportional to 439,856.40, 659,719.80 and 124,345.20

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Solution

The fourth proportional to 439,856.40, 659,719.80 and 124,345.20 is: 186,499.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,856.40 : 659,719.80 = 124,345.20 : x
  2. Step 2: Convert to fraction form
    439,856.40/659,719.80 = 124,345.20/x
  3. Step 3: Cross multiply
    439,856.40x = 659,719.80 × 124,345.20
  4. Step 4: Simplify right side
    439,856.40x = 82,032,990,474.96
  5. Step 5: Solve for x
    x = 82,032,990,474.96/439,856.40
  6. Step 6: Final answer
    x = 186,499.48

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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.