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Finding the Fourth Proportional to 647,998.20, 971,997.30 and 585,790.20

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Solution

The fourth proportional to 647,998.20, 971,997.30 and 585,790.20 is: 878,685.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,998.20 : 971,997.30 = 585,790.20 : x
  2. Step 2: Convert to fraction form
    647,998.20/971,997.30 = 585,790.20/x
  3. Step 3: Cross multiply
    647,998.20x = 971,997.30 × 585,790.20
  4. Step 4: Simplify right side
    647,998.20x = 569,386,492,766.46
  5. Step 5: Solve for x
    x = 569,386,492,766.46/647,998.20
  6. Step 6: Final answer
    x = 878,685.30

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Double scale
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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.