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Finding the Fourth Proportional to 338,986.35, 508,482.36 and 86,267.16

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Solution

The fourth proportional to 338,986.35, 508,482.36 and 86,267.16 is: 129,401.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,986.35 : 508,482.36 = 86,267.16 : x
  2. Step 2: Convert to fraction form
    338,986.35/508,482.36 = 86,267.16/x
  3. Step 3: Cross multiply
    338,986.35x = 508,482.36 × 86,267.16
  4. Step 4: Simplify right side
    338,986.35x = 43,865,329,107.30
  5. Step 5: Solve for x
    x = 43,865,329,107.30/338,986.35
  6. Step 6: Final answer
    x = 129,401.46

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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.