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Finding the Fourth Proportional to 976.19, 1,346.78 and 627.08

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Solution

The fourth proportional to 976.19, 1,346.78 and 627.08 is: 865.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.19 : 1,346.78 = 627.08 : x
  2. Step 2: Convert to fraction form
    976.19/1,346.78 = 627.08/x
  3. Step 3: Cross multiply
    976.19x = 1,346.78 × 627.08
  4. Step 4: Simplify right side
    976.19x = 844,535.67
  5. Step 5: Solve for x
    x = 844,535.67/976.19
  6. Step 6: Final answer
    x = 865.13

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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.