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Finding the Fourth Proportional to 647,999.10, 971,998.65 and 647,999.10

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Solution

The fourth proportional to 647,999.10, 971,998.65 and 647,999.10 is: 971,998.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,999.10 : 971,998.65 = 647,999.10 : x
  2. Step 2: Convert to fraction form
    647,999.10/971,998.65 = 647,999.10/x
  3. Step 3: Cross multiply
    647,999.10x = 971,998.65 × 647,999.10
  4. Step 4: Simplify right side
    647,999.10x = 629,854,250,401.22
  5. Step 5: Solve for x
    x = 629,854,250,401.22/647,999.10
  6. Step 6: Final answer
    x = 971,998.65

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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.