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Finding the Fourth Proportional to 1,539.92, 2,125.06 and 841.30

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Solution

The fourth proportional to 1,539.92, 2,125.06 and 841.30 is: 1,160.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.92 : 2,125.06 = 841.30 : x
  2. Step 2: Convert to fraction form
    1,539.92/2,125.06 = 841.30/x
  3. Step 3: Cross multiply
    1,539.92x = 2,125.06 × 841.30
  4. Step 4: Simplify right side
    1,539.92x = 1,787,812.98
  5. Step 5: Solve for x
    x = 1,787,812.98/1,539.92
  6. Step 6: Final answer
    x = 1,160.98

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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.