Home / 1,430.88-2,146.30-457.05

Finding the Fourth Proportional to 1,430.88, 2,146.30 and 457.05

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Solution

The fourth proportional to 1,430.88, 2,146.30 and 457.05 is: 685.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.88 : 2,146.30 = 457.05 : x
  2. Step 2: Convert to fraction form
    1,430.88/2,146.30 = 457.05/x
  3. Step 3: Cross multiply
    1,430.88x = 2,146.30 × 457.05
  4. Step 4: Simplify right side
    1,430.88x = 980,966.42
  5. Step 5: Solve for x
    x = 980,966.42/1,430.88
  6. Step 6: Final answer
    x = 685.57

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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.