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Finding the Fourth Proportional to 424,401.66, 636,467.45 and 140,039.20

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Solution

The fourth proportional to 424,401.66, 636,467.45 and 140,039.20 is: 210,014.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,401.66 : 636,467.45 = 140,039.20 : x
  2. Step 2: Convert to fraction form
    424,401.66/636,467.45 = 140,039.20/x
  3. Step 3: Cross multiply
    424,401.66x = 636,467.45 × 140,039.20
  4. Step 4: Simplify right side
    424,401.66x = 89,130,392,524.04
  5. Step 5: Solve for x
    x = 89,130,392,524.04/424,401.66
  6. Step 6: Final answer
    x = 210,014.24

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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.