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Finding the Fourth Proportional to 1,539.92, 2,125.16 and 841.32

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Solution

The fourth proportional to 1,539.92, 2,125.16 and 841.32 is: 1,161.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.92 : 2,125.16 = 841.32 : x
  2. Step 2: Convert to fraction form
    1,539.92/2,125.16 = 841.32/x
  3. Step 3: Cross multiply
    1,539.92x = 2,125.16 × 841.32
  4. Step 4: Simplify right side
    1,539.92x = 1,787,939.61
  5. Step 5: Solve for x
    x = 1,787,939.61/1,539.92
  6. Step 6: Final answer
    x = 1,161.06

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1.5x scale

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.