Home / 876,623.86-1,209,690.10-489,463.79

Finding the Fourth Proportional to 876,623.86, 1,209,690.10 and 489,463.79

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Solution

The fourth proportional to 876,623.86, 1,209,690.10 and 489,463.79 is: 675,431.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,623.86 : 1,209,690.10 = 489,463.79 : x
  2. Step 2: Convert to fraction form
    876,623.86/1,209,690.10 = 489,463.79/x
  3. Step 3: Cross multiply
    876,623.86x = 1,209,690.10 × 489,463.79
  4. Step 4: Simplify right side
    876,623.86x = 592,099,503,177.96
  5. Step 5: Solve for x
    x = 592,099,503,177.96/876,623.86
  6. Step 6: Final answer
    x = 675,431.65

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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.