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Finding the Fourth Proportional to 647,712.20, 971,568.30 and 605,721.80

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Solution

The fourth proportional to 647,712.20, 971,568.30 and 605,721.80 is: 908,582.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,712.20 : 971,568.30 = 605,721.80 : x
  2. Step 2: Convert to fraction form
    647,712.20/971,568.30 = 605,721.80/x
  3. Step 3: Cross multiply
    647,712.20x = 971,568.30 × 605,721.80
  4. Step 4: Simplify right side
    647,712.20x = 588,500,099,498.94
  5. Step 5: Solve for x
    x = 588,500,099,498.94/647,712.20
  6. Step 6: Final answer
    x = 908,582.70

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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.