Home / 420,937.21-631,411.29-140,454.46

Finding the Fourth Proportional to 420,937.21, 631,411.29 and 140,454.46

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Solution

The fourth proportional to 420,937.21, 631,411.29 and 140,454.46 is: 210,683.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,937.21 : 631,411.29 = 140,454.46 : x
  2. Step 2: Convert to fraction form
    420,937.21/631,411.29 = 140,454.46/x
  3. Step 3: Cross multiply
    420,937.21x = 631,411.29 × 140,454.46
  4. Step 4: Simplify right side
    420,937.21x = 88,684,531,774.85
  5. Step 5: Solve for x
    x = 88,684,531,774.85/420,937.21
  6. Step 6: Final answer
    x = 210,683.52

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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.