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Finding the Fourth Proportional to 613.30, 920.31 and 555.46

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Solution

The fourth proportional to 613.30, 920.31 and 555.46 is: 833.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.30 : 920.31 = 555.46 : x
  2. Step 2: Convert to fraction form
    613.30/920.31 = 555.46/x
  3. Step 3: Cross multiply
    613.30x = 920.31 × 555.46
  4. Step 4: Simplify right side
    613.30x = 511,195.39
  5. Step 5: Solve for x
    x = 511,195.39/613.30
  6. Step 6: Final answer
    x = 833.52

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Half scale
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Double scale
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Similar ratio
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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.