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Finding the Fourth Proportional to 321,640.10, 482,460.15 and 144,493.10

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Solution

The fourth proportional to 321,640.10, 482,460.15 and 144,493.10 is: 216,739.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,640.10 : 482,460.15 = 144,493.10 : x
  2. Step 2: Convert to fraction form
    321,640.10/482,460.15 = 144,493.10/x
  3. Step 3: Cross multiply
    321,640.10x = 482,460.15 × 144,493.10
  4. Step 4: Simplify right side
    321,640.10x = 69,712,162,699.97
  5. Step 5: Solve for x
    x = 69,712,162,699.97/321,640.10
  6. Step 6: Final answer
    x = 216,739.65

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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.