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Finding the Fourth Proportional to 661,250.79, 991,847.03 and 211,994.21

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Solution

The fourth proportional to 661,250.79, 991,847.03 and 211,994.21 is: 317,981.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,250.79 : 991,847.03 = 211,994.21 : x
  2. Step 2: Convert to fraction form
    661,250.79/991,847.03 = 211,994.21/x
  3. Step 3: Cross multiply
    661,250.79x = 991,847.03 × 211,994.21
  4. Step 4: Simplify right side
    661,250.79x = 210,265,828,985.34
  5. Step 5: Solve for x
    x = 210,265,828,985.34/661,250.79
  6. Step 6: Final answer
    x = 317,981.97

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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.