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Finding the Fourth Proportional to 615,168.40, 921,715.80 and 298,944.40

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Solution

The fourth proportional to 615,168.40, 921,715.80 and 298,944.40 is: 447,912.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,168.40 : 921,715.80 = 298,944.40 : x
  2. Step 2: Convert to fraction form
    615,168.40/921,715.80 = 298,944.40/x
  3. Step 3: Cross multiply
    615,168.40x = 921,715.80 × 298,944.40
  4. Step 4: Simplify right side
    615,168.40x = 275,541,776,801.52
  5. Step 5: Solve for x
    x = 275,541,776,801.52/615,168.40
  6. Step 6: Final answer
    x = 447,912.76

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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.