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Finding the Fourth Proportional to 1,539.56, 2,124.63 and 876.49

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Solution

The fourth proportional to 1,539.56, 2,124.63 and 876.49 is: 1,209.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539.56 : 2,124.63 = 876.49 : x
  2. Step 2: Convert to fraction form
    1,539.56/2,124.63 = 876.49/x
  3. Step 3: Cross multiply
    1,539.56x = 2,124.63 × 876.49
  4. Step 4: Simplify right side
    1,539.56x = 1,862,206.33
  5. Step 5: Solve for x
    x = 1,862,206.33/1,539.56
  6. Step 6: Final answer
    x = 1,209.57

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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.