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Finding the Fourth Proportional to 338,722.32, 508,083.71 and 86,021.76

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Solution

The fourth proportional to 338,722.32, 508,083.71 and 86,021.76 is: 129,032.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,722.32 : 508,083.71 = 86,021.76 : x
  2. Step 2: Convert to fraction form
    338,722.32/508,083.71 = 86,021.76/x
  3. Step 3: Cross multiply
    338,722.32x = 508,083.71 × 86,021.76
  4. Step 4: Simplify right side
    338,722.32x = 43,706,254,531.42
  5. Step 5: Solve for x
    x = 43,706,254,531.42/338,722.32
  6. Step 6: Final answer
    x = 129,032.70

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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.