Home / 420,170.28-630,255.10-124,682.28

Finding the Fourth Proportional to 420,170.28, 630,255.10 and 124,682.28

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Solution

The fourth proportional to 420,170.28, 630,255.10 and 124,682.28 is: 187,023.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,170.28 : 630,255.10 = 124,682.28 : x
  2. Step 2: Convert to fraction form
    420,170.28/630,255.10 = 124,682.28/x
  3. Step 3: Cross multiply
    420,170.28x = 630,255.10 × 124,682.28
  4. Step 4: Simplify right side
    420,170.28x = 78,581,642,849.63
  5. Step 5: Solve for x
    x = 78,581,642,849.63/420,170.28
  6. Step 6: Final answer
    x = 187,023.33

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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.