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Finding the Fourth Proportional to 1,349.85, 1,862.74 and 818.79

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Solution

The fourth proportional to 1,349.85, 1,862.74 and 818.79 is: 1,129.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349.85 : 1,862.74 = 818.79 : x
  2. Step 2: Convert to fraction form
    1,349.85/1,862.74 = 818.79/x
  3. Step 3: Cross multiply
    1,349.85x = 1,862.74 × 818.79
  4. Step 4: Simplify right side
    1,349.85x = 1,525,193.91
  5. Step 5: Solve for x
    x = 1,525,193.91/1,349.85
  6. Step 6: Final answer
    x = 1,129.90

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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.