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Finding the Fourth Proportional to 1,113.77, 1,671.23 and 456.13

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Solution

The fourth proportional to 1,113.77, 1,671.23 and 456.13 is: 684.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.77 : 1,671.23 = 456.13 : x
  2. Step 2: Convert to fraction form
    1,113.77/1,671.23 = 456.13/x
  3. Step 3: Cross multiply
    1,113.77x = 1,671.23 × 456.13
  4. Step 4: Simplify right side
    1,113.77x = 762,287.50
  5. Step 5: Solve for x
    x = 762,287.50/1,113.77
  6. Step 6: Final answer
    x = 684.42

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