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Finding the Fourth Proportional to 452,728.80, 678,315.60 and 215,560.80

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Solution

The fourth proportional to 452,728.80, 678,315.60 and 215,560.80 is: 322,970.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,728.80 : 678,315.60 = 215,560.80 : x
  2. Step 2: Convert to fraction form
    452,728.80/678,315.60 = 215,560.80/x
  3. Step 3: Cross multiply
    452,728.80x = 678,315.60 × 215,560.80
  4. Step 4: Simplify right side
    452,728.80x = 146,218,253,388.48
  5. Step 5: Solve for x
    x = 146,218,253,388.48/452,728.80
  6. Step 6: Final answer
    x = 322,970.96

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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.