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Finding the Fourth Proportional to 321,646.10, 482,469.15 and 144,499.10

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Solution

The fourth proportional to 321,646.10, 482,469.15 and 144,499.10 is: 216,748.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,646.10 : 482,469.15 = 144,499.10 : x
  2. Step 2: Convert to fraction form
    321,646.10/482,469.15 = 144,499.10/x
  3. Step 3: Cross multiply
    321,646.10x = 482,469.15 × 144,499.10
  4. Step 4: Simplify right side
    321,646.10x = 69,716,357,952.77
  5. Step 5: Solve for x
    x = 69,716,357,952.77/321,646.10
  6. Step 6: Final answer
    x = 216,748.65

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Double scale
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Similar ratio
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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.