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Finding the Fourth Proportional to 830.55, 1,145.97 and 481.17

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Solution

The fourth proportional to 830.55, 1,145.97 and 481.17 is: 663.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.55 : 1,145.97 = 481.17 : x
  2. Step 2: Convert to fraction form
    830.55/1,145.97 = 481.17/x
  3. Step 3: Cross multiply
    830.55x = 1,145.97 × 481.17
  4. Step 4: Simplify right side
    830.55x = 551,406.38
  5. Step 5: Solve for x
    x = 551,406.38/830.55
  6. Step 6: Final answer
    x = 663.91

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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.