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Finding the Fourth Proportional to 518,446.88, 715,456.72 and 279,982.88

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Solution

The fourth proportional to 518,446.88, 715,456.72 and 279,982.88 is: 386,376.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,446.88 : 715,456.72 = 279,982.88 : x
  2. Step 2: Convert to fraction form
    518,446.88/715,456.72 = 279,982.88/x
  3. Step 3: Cross multiply
    518,446.88x = 715,456.72 × 279,982.88
  4. Step 4: Simplify right side
    518,446.88x = 200,315,628,703.71
  5. Step 5: Solve for x
    x = 200,315,628,703.71/518,446.88
  6. Step 6: Final answer
    x = 386,376.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.