Home / 420,764.71-631,152.65-140,282.05

Finding the Fourth Proportional to 420,764.71, 631,152.65 and 140,282.05

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Solution

The fourth proportional to 420,764.71, 631,152.65 and 140,282.05 is: 210,424.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,764.71 : 631,152.65 = 140,282.05 : x
  2. Step 2: Convert to fraction form
    420,764.71/631,152.65 = 140,282.05/x
  3. Step 3: Cross multiply
    420,764.71x = 631,152.65 × 140,282.05
  4. Step 4: Simplify right side
    420,764.71x = 88,539,387,604.93
  5. Step 5: Solve for x
    x = 88,539,387,604.93/420,764.71
  6. Step 6: Final answer
    x = 210,424.94

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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.