Home / 1,417.28-2,126.14-443.16

Finding the Fourth Proportional to 1,417.28, 2,126.14 and 443.16

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Solution

The fourth proportional to 1,417.28, 2,126.14 and 443.16 is: 664.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.28 : 2,126.14 = 443.16 : x
  2. Step 2: Convert to fraction form
    1,417.28/2,126.14 = 443.16/x
  3. Step 3: Cross multiply
    1,417.28x = 2,126.14 × 443.16
  4. Step 4: Simplify right side
    1,417.28x = 942,220.20
  5. Step 5: Solve for x
    x = 942,220.20/1,417.28
  6. Step 6: Final answer
    x = 664.81

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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.