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Finding the Fourth Proportional to 381,817.40, 572,726.10 and 319,609.40

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Solution

The fourth proportional to 381,817.40, 572,726.10 and 319,609.40 is: 479,414.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,817.40 : 572,726.10 = 319,609.40 : x
  2. Step 2: Convert to fraction form
    381,817.40/572,726.10 = 319,609.40/x
  3. Step 3: Cross multiply
    381,817.40x = 572,726.10 × 319,609.40
  4. Step 4: Simplify right side
    381,817.40x = 183,048,645,185.34
  5. Step 5: Solve for x
    x = 183,048,645,185.34/381,817.40
  6. Step 6: Final answer
    x = 479,414.10

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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.