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Finding the Fourth Proportional to 830.24, 1,146.12 and 480.86

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Solution

The fourth proportional to 830.24, 1,146.12 and 480.86 is: 663.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.24 : 1,146.12 = 480.86 : x
  2. Step 2: Convert to fraction form
    830.24/1,146.12 = 480.86/x
  3. Step 3: Cross multiply
    830.24x = 1,146.12 × 480.86
  4. Step 4: Simplify right side
    830.24x = 551,123.26
  5. Step 5: Solve for x
    x = 551,123.26/830.24
  6. Step 6: Final answer
    x = 663.81

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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.