Home / 1,431.23-2,147.26-457.41

Finding the Fourth Proportional to 1,431.23, 2,147.26 and 457.41

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Solution

The fourth proportional to 1,431.23, 2,147.26 and 457.41 is: 686.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.23 : 2,147.26 = 457.41 : x
  2. Step 2: Convert to fraction form
    1,431.23/2,147.26 = 457.41/x
  3. Step 3: Cross multiply
    1,431.23x = 2,147.26 × 457.41
  4. Step 4: Simplify right side
    1,431.23x = 982,178.20
  5. Step 5: Solve for x
    x = 982,178.20/1,431.23
  6. Step 6: Final answer
    x = 686.25

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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.