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Finding the Fourth Proportional to 338,967.93, 508,454.91 and 86,248.65

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Solution

The fourth proportional to 338,967.93, 508,454.91 and 86,248.65 is: 129,373.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,967.93 : 508,454.91 = 86,248.65 : x
  2. Step 2: Convert to fraction form
    338,967.93/508,454.91 = 86,248.65/x
  3. Step 3: Cross multiply
    338,967.93x = 508,454.91 × 86,248.65
  4. Step 4: Simplify right side
    338,967.93x = 43,853,549,573.37
  5. Step 5: Solve for x
    x = 43,853,549,573.37/338,967.93
  6. Step 6: Final answer
    x = 129,373.74

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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.