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Finding the Fourth Proportional to 338,740.86, 508,111.47 and 86,040.30

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Solution

The fourth proportional to 338,740.86, 508,111.47 and 86,040.30 is: 129,060.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,740.86 : 508,111.47 = 86,040.30 : x
  2. Step 2: Convert to fraction form
    338,740.86/508,111.47 = 86,040.30/x
  3. Step 3: Cross multiply
    338,740.86x = 508,111.47 × 86,040.30
  4. Step 4: Simplify right side
    338,740.86x = 43,718,063,312.24
  5. Step 5: Solve for x
    x = 43,718,063,312.24/338,740.86
  6. Step 6: Final answer
    x = 129,060.50

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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.