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Finding the Fourth Proportional to 1,539.85, 2,124.67 and 910.06

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Solution

The fourth proportional to 1,539.85, 2,124.67 and 910.06 is: 1,255.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.85 : 2,124.67 = 910.06 : x
  2. Step 2: Convert to fraction form
    1,539.85/2,124.67 = 910.06/x
  3. Step 3: Cross multiply
    1,539.85x = 2,124.67 × 910.06
  4. Step 4: Simplify right side
    1,539.85x = 1,933,576.80
  5. Step 5: Solve for x
    x = 1,933,576.80/1,539.85
  6. Step 6: Final answer
    x = 1,255.70

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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.