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Finding the Fourth Proportional to 305,575.80, 458,363.70 and 80,970.90

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Solution

The fourth proportional to 305,575.80, 458,363.70 and 80,970.90 is: 121,456.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,575.80 : 458,363.70 = 80,970.90 : x
  2. Step 2: Convert to fraction form
    305,575.80/458,363.70 = 80,970.90/x
  3. Step 3: Cross multiply
    305,575.80x = 458,363.70 × 80,970.90
  4. Step 4: Simplify right side
    305,575.80x = 37,114,121,316.33
  5. Step 5: Solve for x
    x = 37,114,121,316.33/305,575.80
  6. Step 6: Final answer
    x = 121,456.35

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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.