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Finding the Fourth Proportional to 647,997.80, 971,996.70 and 410,635.40

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Solution

The fourth proportional to 647,997.80, 971,996.70 and 410,635.40 is: 615,953.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,997.80 : 971,996.70 = 410,635.40 : x
  2. Step 2: Convert to fraction form
    647,997.80/971,996.70 = 410,635.40/x
  3. Step 3: Cross multiply
    647,997.80x = 971,996.70 × 410,635.40
  4. Step 4: Simplify right side
    647,997.80x = 399,136,253,703.18
  5. Step 5: Solve for x
    x = 399,136,253,703.18/647,997.80
  6. Step 6: Final answer
    x = 615,953.10

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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.