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Finding the Fourth Proportional to 1,218.57, 1,681.50 and 746.25

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Solution

The fourth proportional to 1,218.57, 1,681.50 and 746.25 is: 1,029.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.57 : 1,681.50 = 746.25 : x
  2. Step 2: Convert to fraction form
    1,218.57/1,681.50 = 746.25/x
  3. Step 3: Cross multiply
    1,218.57x = 1,681.50 × 746.25
  4. Step 4: Simplify right side
    1,218.57x = 1,254,819.38
  5. Step 5: Solve for x
    x = 1,254,819.38/1,218.57
  6. Step 6: Final answer
    x = 1,029.75

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.