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Finding the Fourth Proportional to 611,686.80, 915,715.80 and 454,611.60

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Solution

The fourth proportional to 611,686.80, 915,715.80 and 454,611.60 is: 680,568.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,686.80 : 915,715.80 = 454,611.60 : x
  2. Step 2: Convert to fraction form
    611,686.80/915,715.80 = 454,611.60/x
  3. Step 3: Cross multiply
    611,686.80x = 915,715.80 × 454,611.60
  4. Step 4: Simplify right side
    611,686.80x = 416,295,024,983.28
  5. Step 5: Solve for x
    x = 416,295,024,983.28/611,686.80
  6. Step 6: Final answer
    x = 680,568.92

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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.