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Finding the Fourth Proportional to 615,142.80, 921,850.20 and 488,998.80

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Solution

The fourth proportional to 615,142.80, 921,850.20 and 488,998.80 is: 732,811.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,142.80 : 921,850.20 = 488,998.80 : x
  2. Step 2: Convert to fraction form
    615,142.80/921,850.20 = 488,998.80/x
  3. Step 3: Cross multiply
    615,142.80x = 921,850.20 × 488,998.80
  4. Step 4: Simplify right side
    615,142.80x = 450,783,641,579.76
  5. Step 5: Solve for x
    x = 450,783,641,579.76/615,142.80
  6. Step 6: Final answer
    x = 732,811.38

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Similar ratio
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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.