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Finding the Fourth Proportional to 518,667.88, 778,001.82 and 139,589.46

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Solution

The fourth proportional to 518,667.88, 778,001.82 and 139,589.46 is: 209,384.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,667.88 : 778,001.82 = 139,589.46 : x
  2. Step 2: Convert to fraction form
    518,667.88/778,001.82 = 139,589.46/x
  3. Step 3: Cross multiply
    518,667.88x = 778,001.82 × 139,589.46
  4. Step 4: Simplify right side
    518,667.88x = 108,600,853,932.82
  5. Step 5: Solve for x
    x = 108,600,853,932.82/518,667.88
  6. Step 6: Final answer
    x = 209,384.19

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Similar ratio
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1.5x scale

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.