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Finding the Fourth Proportional to 876,657.15, 1,209,774.97 and 489,478.52

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Solution

The fourth proportional to 876,657.15, 1,209,774.97 and 489,478.52 is: 675,473.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,657.15 : 1,209,774.97 = 489,478.52 : x
  2. Step 2: Convert to fraction form
    876,657.15/1,209,774.97 = 489,478.52/x
  3. Step 3: Cross multiply
    876,657.15x = 1,209,774.97 × 489,478.52
  4. Step 4: Simplify right side
    876,657.15x = 592,158,861,848.64
  5. Step 5: Solve for x
    x = 592,158,861,848.64/876,657.15
  6. Step 6: Final answer
    x = 675,473.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.