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Finding the Fourth Proportional to 834.30, 1,151.89 and 555.08

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Solution

The fourth proportional to 834.30, 1,151.89 and 555.08 is: 766.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.30 : 1,151.89 = 555.08 : x
  2. Step 2: Convert to fraction form
    834.30/1,151.89 = 555.08/x
  3. Step 3: Cross multiply
    834.30x = 1,151.89 × 555.08
  4. Step 4: Simplify right side
    834.30x = 639,391.10
  5. Step 5: Solve for x
    x = 639,391.10/834.30
  6. Step 6: Final answer
    x = 766.38

Related Problems

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.