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Finding the Fourth Proportional to 615,231.80, 921,983.70 and 489,087.80

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Solution

The fourth proportional to 615,231.80, 921,983.70 and 489,087.80 is: 732,944.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,231.80 : 921,983.70 = 489,087.80 : x
  2. Step 2: Convert to fraction form
    615,231.80/921,983.70 = 489,087.80/x
  3. Step 3: Cross multiply
    615,231.80x = 921,983.70 × 489,087.80
  4. Step 4: Simplify right side
    615,231.80x = 450,930,979,468.86
  5. Step 5: Solve for x
    x = 450,930,979,468.86/615,231.80
  6. Step 6: Final answer
    x = 732,944.85

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1.5x scale

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.