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Finding the Fourth Proportional to 549,104.40, 822,052.80 and 391,640.40

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Solution

The fourth proportional to 549,104.40, 822,052.80 and 391,640.40 is: 586,316.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,104.40 : 822,052.80 = 391,640.40 : x
  2. Step 2: Convert to fraction form
    549,104.40/822,052.80 = 391,640.40/x
  3. Step 3: Cross multiply
    549,104.40x = 822,052.80 × 391,640.40
  4. Step 4: Simplify right side
    549,104.40x = 321,949,087,413.12
  5. Step 5: Solve for x
    x = 321,949,087,413.12/549,104.40
  6. Step 6: Final answer
    x = 586,316.71

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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.