Home / 420,200.44-630,306.12-139,717.69

Finding the Fourth Proportional to 420,200.44, 630,306.12 and 139,717.69

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Solution

The fourth proportional to 420,200.44, 630,306.12 and 139,717.69 is: 209,578.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,200.44 : 630,306.12 = 139,717.69 : x
  2. Step 2: Convert to fraction form
    420,200.44/630,306.12 = 139,717.69/x
  3. Step 3: Cross multiply
    420,200.44x = 630,306.12 × 139,717.69
  4. Step 4: Simplify right side
    420,200.44x = 88,064,914,027.44
  5. Step 5: Solve for x
    x = 88,064,914,027.44/420,200.44
  6. Step 6: Final answer
    x = 209,578.35

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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.