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Finding the Fourth Proportional to 328,276.20, 492,407.10 and 91,612.20

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Solution

The fourth proportional to 328,276.20, 492,407.10 and 91,612.20 is: 137,416.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,276.20 : 492,407.10 = 91,612.20 : x
  2. Step 2: Convert to fraction form
    328,276.20/492,407.10 = 91,612.20/x
  3. Step 3: Cross multiply
    328,276.20x = 492,407.10 × 91,612.20
  4. Step 4: Simplify right side
    328,276.20x = 45,110,497,726.62
  5. Step 5: Solve for x
    x = 45,110,497,726.62/328,276.20
  6. Step 6: Final answer
    x = 137,416.29

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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.