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Finding the Fourth Proportional to 1,812.38, 2,718.58 and 658.10

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Solution

The fourth proportional to 1,812.38, 2,718.58 and 658.10 is: 987.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.38 : 2,718.58 = 658.10 : x
  2. Step 2: Convert to fraction form
    1,812.38/2,718.58 = 658.10/x
  3. Step 3: Cross multiply
    1,812.38x = 2,718.58 × 658.10
  4. Step 4: Simplify right side
    1,812.38x = 1,789,097.50
  5. Step 5: Solve for x
    x = 1,789,097.50/1,812.38
  6. Step 6: Final answer
    x = 987.15

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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.