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Finding the Fourth Proportional to 1,174.99, 1,621.29 and 677.69

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Solution

The fourth proportional to 1,174.99, 1,621.29 and 677.69 is: 935.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.99 : 1,621.29 = 677.69 : x
  2. Step 2: Convert to fraction form
    1,174.99/1,621.29 = 677.69/x
  3. Step 3: Cross multiply
    1,174.99x = 1,621.29 × 677.69
  4. Step 4: Simplify right side
    1,174.99x = 1,098,732.02
  5. Step 5: Solve for x
    x = 1,098,732.02/1,174.99
  6. Step 6: Final answer
    x = 935.10

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Half scale
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Double scale
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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.