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Finding the Fourth Proportional to 612,715.30, 919,072.95 and 455,251.30

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Solution

The fourth proportional to 612,715.30, 919,072.95 and 455,251.30 is: 682,876.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,715.30 : 919,072.95 = 455,251.30 : x
  2. Step 2: Convert to fraction form
    612,715.30/919,072.95 = 455,251.30/x
  3. Step 3: Cross multiply
    612,715.30x = 919,072.95 × 455,251.30
  4. Step 4: Simplify right side
    612,715.30x = 418,409,155,282.34
  5. Step 5: Solve for x
    x = 418,409,155,282.34/612,715.30
  6. Step 6: Final answer
    x = 682,876.95

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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.