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Finding the Fourth Proportional to 830.60, 1,145.22 and 732.20

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Solution

The fourth proportional to 830.60, 1,145.22 and 732.20 is: 1,009.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.60 : 1,145.22 = 732.20 : x
  2. Step 2: Convert to fraction form
    830.60/1,145.22 = 732.20/x
  3. Step 3: Cross multiply
    830.60x = 1,145.22 × 732.20
  4. Step 4: Simplify right side
    830.60x = 838,530.08
  5. Step 5: Solve for x
    x = 838,530.08/830.60
  6. Step 6: Final answer
    x = 1,009.55

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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.