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Finding the Fourth Proportional to 1,174.47, 1,620.81 and 677.13

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Solution

The fourth proportional to 1,174.47, 1,620.81 and 677.13 is: 934.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.47 : 1,620.81 = 677.13 : x
  2. Step 2: Convert to fraction form
    1,174.47/1,620.81 = 677.13/x
  3. Step 3: Cross multiply
    1,174.47x = 1,620.81 × 677.13
  4. Step 4: Simplify right side
    1,174.47x = 1,097,499.08
  5. Step 5: Solve for x
    x = 1,097,499.08/1,174.47
  6. Step 6: Final answer
    x = 934.46

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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.