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Finding the Fourth Proportional to 390,820.55, 585,824.39 and 151,099.11

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Solution

The fourth proportional to 390,820.55, 585,824.39 and 151,099.11 is: 226,491.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,820.55 : 585,824.39 = 151,099.11 : x
  2. Step 2: Convert to fraction form
    390,820.55/585,824.39 = 151,099.11/x
  3. Step 3: Cross multiply
    390,820.55x = 585,824.39 × 151,099.11
  4. Step 4: Simplify right side
    390,820.55x = 88,517,543,189.80
  5. Step 5: Solve for x
    x = 88,517,543,189.80/390,820.55
  6. Step 6: Final answer
    x = 226,491.53

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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.