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Finding the Fourth Proportional to 866,885.28, 1,196,415 and 484,990.80

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Solution

The fourth proportional to 866,885.28, 1,196,415 and 484,990.80 is: 669,350.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,885.28 : 1,196,415 = 484,990.80 : x
  2. Step 2: Convert to fraction form
    866,885.28/1,196,415 = 484,990.80/x
  3. Step 3: Cross multiply
    866,885.28x = 1,196,415 × 484,990.80
  4. Step 4: Simplify right side
    866,885.28x = 580,250,267,982
  5. Step 5: Solve for x
    x = 580,250,267,982/866,885.28
  6. Step 6: Final answer
    x = 669,350.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.