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Finding the Fourth Proportional to 839.87, 1,159.12 and 508.29

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Solution

The fourth proportional to 839.87, 1,159.12 and 508.29 is: 701.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.87 : 1,159.12 = 508.29 : x
  2. Step 2: Convert to fraction form
    839.87/1,159.12 = 508.29/x
  3. Step 3: Cross multiply
    839.87x = 1,159.12 × 508.29
  4. Step 4: Simplify right side
    839.87x = 589,167.74
  5. Step 5: Solve for x
    x = 589,167.74/839.87
  6. Step 6: Final answer
    x = 701.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.