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Finding the Fourth Proportional to 321,911.40, 482,867.10 and 238,967.40

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Solution

The fourth proportional to 321,911.40, 482,867.10 and 238,967.40 is: 358,451.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,911.40 : 482,867.10 = 238,967.40 : x
  2. Step 2: Convert to fraction form
    321,911.40/482,867.10 = 238,967.40/x
  3. Step 3: Cross multiply
    321,911.40x = 482,867.10 × 238,967.40
  4. Step 4: Simplify right side
    321,911.40x = 115,389,495,432.54
  5. Step 5: Solve for x
    x = 115,389,495,432.54/321,911.40
  6. Step 6: Final answer
    x = 358,451.10

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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.