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Finding the Fourth Proportional to 1,358.79, 1,874.66 and 834.63

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Solution

The fourth proportional to 1,358.79, 1,874.66 and 834.63 is: 1,151.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.79 : 1,874.66 = 834.63 : x
  2. Step 2: Convert to fraction form
    1,358.79/1,874.66 = 834.63/x
  3. Step 3: Cross multiply
    1,358.79x = 1,874.66 × 834.63
  4. Step 4: Simplify right side
    1,358.79x = 1,564,643.30
  5. Step 5: Solve for x
    x = 1,564,643.30/1,358.79
  6. Step 6: Final answer
    x = 1,151.50

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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.