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Finding the Fourth Proportional to 386,867.70, 580,301.55 and 366,200.55

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Solution

The fourth proportional to 386,867.70, 580,301.55 and 366,200.55 is: 549,300.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,867.70 : 580,301.55 = 366,200.55 : x
  2. Step 2: Convert to fraction form
    386,867.70/580,301.55 = 366,200.55/x
  3. Step 3: Cross multiply
    386,867.70x = 580,301.55 × 366,200.55
  4. Step 4: Simplify right side
    386,867.70x = 212,506,746,775.85
  5. Step 5: Solve for x
    x = 212,506,746,775.85/386,867.70
  6. Step 6: Final answer
    x = 549,300.83

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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.