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Finding the Fourth Proportional to 1,240.59, 1,861.19 and 876.09

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Solution

The fourth proportional to 1,240.59, 1,861.19 and 876.09 is: 1,314.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.59 : 1,861.19 = 876.09 : x
  2. Step 2: Convert to fraction form
    1,240.59/1,861.19 = 876.09/x
  3. Step 3: Cross multiply
    1,240.59x = 1,861.19 × 876.09
  4. Step 4: Simplify right side
    1,240.59x = 1,630,569.95
  5. Step 5: Solve for x
    x = 1,630,569.95/1,240.59
  6. Step 6: Final answer
    x = 1,314.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.