Home / 420,501.20-630,852.24-140,020.88

Finding the Fourth Proportional to 420,501.20, 630,852.24 and 140,020.88

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Solution

The fourth proportional to 420,501.20, 630,852.24 and 140,020.88 is: 210,064.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,501.20 : 630,852.24 = 140,020.88 : x
  2. Step 2: Convert to fraction form
    420,501.20/630,852.24 = 140,020.88/x
  3. Step 3: Cross multiply
    420,501.20x = 630,852.24 × 140,020.88
  4. Step 4: Simplify right side
    420,501.20x = 88,332,485,794.77
  5. Step 5: Solve for x
    x = 88,332,485,794.77/420,501.20
  6. Step 6: Final answer
    x = 210,064.77

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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.