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Finding the Fourth Proportional to 390,394.88, 582,310.66 and 354,517.14

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Solution

The fourth proportional to 390,394.88, 582,310.66 and 354,517.14 is: 528,795.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,394.88 : 582,310.66 = 354,517.14 : x
  2. Step 2: Convert to fraction form
    390,394.88/582,310.66 = 354,517.14/x
  3. Step 3: Cross multiply
    390,394.88x = 582,310.66 × 354,517.14
  4. Step 4: Simplify right side
    390,394.88x = 206,439,108,888.42
  5. Step 5: Solve for x
    x = 206,439,108,888.42/390,394.88
  6. Step 6: Final answer
    x = 528,795.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.