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Finding the Fourth Proportional to 486,508.40, 728,207.40 and 346,540.40

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Solution

The fourth proportional to 486,508.40, 728,207.40 and 346,540.40 is: 518,702.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,508.40 : 728,207.40 = 346,540.40 : x
  2. Step 2: Convert to fraction form
    486,508.40/728,207.40 = 346,540.40/x
  3. Step 3: Cross multiply
    486,508.40x = 728,207.40 × 346,540.40
  4. Step 4: Simplify right side
    486,508.40x = 252,353,283,678.96
  5. Step 5: Solve for x
    x = 252,353,283,678.96/486,508.40
  6. Step 6: Final answer
    x = 518,702.83

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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.