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Finding the Fourth Proportional to 390,584.16, 585,876.24 and 370,638.72

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Solution

The fourth proportional to 390,584.16, 585,876.24 and 370,638.72 is: 555,958.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,584.16 : 585,876.24 = 370,638.72 : x
  2. Step 2: Convert to fraction form
    390,584.16/585,876.24 = 370,638.72/x
  3. Step 3: Cross multiply
    390,584.16x = 585,876.24 × 370,638.72
  4. Step 4: Simplify right side
    390,584.16x = 217,148,419,672.01
  5. Step 5: Solve for x
    x = 217,148,419,672.01/390,584.16
  6. Step 6: Final answer
    x = 555,958.08

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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.