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Finding the Fourth Proportional to 1,458.73, 2,187.32 and 763.72

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Solution

The fourth proportional to 1,458.73, 2,187.32 and 763.72 is: 1,145.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.73 : 2,187.32 = 763.72 : x
  2. Step 2: Convert to fraction form
    1,458.73/2,187.32 = 763.72/x
  3. Step 3: Cross multiply
    1,458.73x = 2,187.32 × 763.72
  4. Step 4: Simplify right side
    1,458.73x = 1,670,500.03
  5. Step 5: Solve for x
    x = 1,670,500.03/1,458.73
  6. Step 6: Final answer
    x = 1,145.17

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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.