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Finding the Fourth Proportional to 873.74, 1,310.61 and 441.20

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Solution

The fourth proportional to 873.74, 1,310.61 and 441.20 is: 661.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.74 : 1,310.61 = 441.20 : x
  2. Step 2: Convert to fraction form
    873.74/1,310.61 = 441.20/x
  3. Step 3: Cross multiply
    873.74x = 1,310.61 × 441.20
  4. Step 4: Simplify right side
    873.74x = 578,234.97
  5. Step 5: Solve for x
    x = 578,234.97/873.74
  6. Step 6: Final answer
    x = 661.80

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