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Finding the Fourth Proportional to 321,411.40, 482,117.10 and 269,312.20

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Solution

The fourth proportional to 321,411.40, 482,117.10 and 269,312.20 is: 403,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,411.40 : 482,117.10 = 269,312.20 : x
  2. Step 2: Convert to fraction form
    321,411.40/482,117.10 = 269,312.20/x
  3. Step 3: Cross multiply
    321,411.40x = 482,117.10 × 269,312.20
  4. Step 4: Simplify right side
    321,411.40x = 129,840,016,858.62
  5. Step 5: Solve for x
    x = 129,840,016,858.62/321,411.40
  6. Step 6: Final answer
    x = 403,968.30

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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.