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Finding the Fourth Proportional to 338,987.35, 508,483.86 and 86,268.16

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Solution

The fourth proportional to 338,987.35, 508,483.86 and 86,268.16 is: 129,402.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,987.35 : 508,483.86 = 86,268.16 : x
  2. Step 2: Convert to fraction form
    338,987.35/508,483.86 = 86,268.16/x
  3. Step 3: Cross multiply
    338,987.35x = 508,483.86 × 86,268.16
  4. Step 4: Simplify right side
    338,987.35x = 43,865,966,991.90
  5. Step 5: Solve for x
    x = 43,865,966,991.90/338,987.35
  6. Step 6: Final answer
    x = 129,402.96

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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.