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Finding the Fourth Proportional to 823.59, 1,135.49 and 626.76

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Solution

The fourth proportional to 823.59, 1,135.49 and 626.76 is: 864.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.59 : 1,135.49 = 626.76 : x
  2. Step 2: Convert to fraction form
    823.59/1,135.49 = 626.76/x
  3. Step 3: Cross multiply
    823.59x = 1,135.49 × 626.76
  4. Step 4: Simplify right side
    823.59x = 711,676.58
  5. Step 5: Solve for x
    x = 711,676.58/823.59
  6. Step 6: Final answer
    x = 864.12

Related Problems

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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.