Home / 420,934.78-631,407.63-140,452.03

Finding the Fourth Proportional to 420,934.78, 631,407.63 and 140,452.03

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Solution

The fourth proportional to 420,934.78, 631,407.63 and 140,452.03 is: 210,679.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,934.78 : 631,407.63 = 140,452.03 : x
  2. Step 2: Convert to fraction form
    420,934.78/631,407.63 = 140,452.03/x
  3. Step 3: Cross multiply
    420,934.78x = 631,407.63 × 140,452.03
  4. Step 4: Simplify right side
    420,934.78x = 88,682,482,931.11
  5. Step 5: Solve for x
    x = 88,682,482,931.11/420,934.78
  6. Step 6: Final answer
    x = 210,679.87

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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.