Home / 1,431.47-2,147.53-457.56

Finding the Fourth Proportional to 1,431.47, 2,147.53 and 457.56

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Solution

The fourth proportional to 1,431.47, 2,147.53 and 457.56 is: 686.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.47 : 2,147.53 = 457.56 : x
  2. Step 2: Convert to fraction form
    1,431.47/2,147.53 = 457.56/x
  3. Step 3: Cross multiply
    1,431.47x = 2,147.53 × 457.56
  4. Step 4: Simplify right side
    1,431.47x = 982,622.68
  5. Step 5: Solve for x
    x = 982,622.68/1,431.47
  6. Step 6: Final answer
    x = 686.45

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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.