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Finding the Fourth Proportional to 830.25, 1,146.15 and 633.42

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Solution

The fourth proportional to 830.25, 1,146.15 and 633.42 is: 874.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.25 : 1,146.15 = 633.42 : x
  2. Step 2: Convert to fraction form
    830.25/1,146.15 = 633.42/x
  3. Step 3: Cross multiply
    830.25x = 1,146.15 × 633.42
  4. Step 4: Simplify right side
    830.25x = 725,994.33
  5. Step 5: Solve for x
    x = 725,994.33/830.25
  6. Step 6: Final answer
    x = 874.43

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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.