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Finding the Fourth Proportional to 811.56, 1,118.74 and 574.76

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Solution

The fourth proportional to 811.56, 1,118.74 and 574.76 is: 792.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.56 : 1,118.74 = 574.76 : x
  2. Step 2: Convert to fraction form
    811.56/1,118.74 = 574.76/x
  3. Step 3: Cross multiply
    811.56x = 1,118.74 × 574.76
  4. Step 4: Simplify right side
    811.56x = 643,007.00
  5. Step 5: Solve for x
    x = 643,007.00/811.56
  6. Step 6: Final answer
    x = 792.31

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.