Home / 420,630.30-630,945.45-140,147.55

Finding the Fourth Proportional to 420,630.30, 630,945.45 and 140,147.55

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Solution

The fourth proportional to 420,630.30, 630,945.45 and 140,147.55 is: 210,221.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,630.30 : 630,945.45 = 140,147.55 : x
  2. Step 2: Convert to fraction form
    420,630.30/630,945.45 = 140,147.55/x
  3. Step 3: Cross multiply
    420,630.30x = 630,945.45 × 140,147.55
  4. Step 4: Simplify right side
    420,630.30x = 88,425,459,001.15
  5. Step 5: Solve for x
    x = 88,425,459,001.15/420,630.30
  6. Step 6: Final answer
    x = 210,221.33

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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.