Home / 420,422.24-630,642-139,941.92

Finding the Fourth Proportional to 420,422.24, 630,642 and 139,941.92

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Solution

The fourth proportional to 420,422.24, 630,642 and 139,941.92 is: 209,915.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,422.24 : 630,642 = 139,941.92 : x
  2. Step 2: Convert to fraction form
    420,422.24/630,642 = 139,941.92/x
  3. Step 3: Cross multiply
    420,422.24x = 630,642 × 139,941.92
  4. Step 4: Simplify right side
    420,422.24x = 88,253,252,312.64
  5. Step 5: Solve for x
    x = 88,253,252,312.64/420,422.24
  6. Step 6: Final answer
    x = 209,915.76

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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.