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Finding the Fourth Proportional to 1,358.83, 1,876.53 and 918.46

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Solution

The fourth proportional to 1,358.83, 1,876.53 and 918.46 is: 1,268.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.83 : 1,876.53 = 918.46 : x
  2. Step 2: Convert to fraction form
    1,358.83/1,876.53 = 918.46/x
  3. Step 3: Cross multiply
    1,358.83x = 1,876.53 × 918.46
  4. Step 4: Simplify right side
    1,358.83x = 1,723,517.74
  5. Step 5: Solve for x
    x = 1,723,517.74/1,358.83
  6. Step 6: Final answer
    x = 1,268.38

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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.