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Finding the Fourth Proportional to 659,258.70, 988,560.55 and 209,920.90

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Solution

The fourth proportional to 659,258.70, 988,560.55 and 209,920.90 is: 314,777.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,258.70 : 988,560.55 = 209,920.90 : x
  2. Step 2: Convert to fraction form
    659,258.70/988,560.55 = 209,920.90/x
  3. Step 3: Cross multiply
    659,258.70x = 988,560.55 × 209,920.90
  4. Step 4: Simplify right side
    659,258.70x = 207,519,520,360.50
  5. Step 5: Solve for x
    x = 207,519,520,360.50/659,258.70
  6. Step 6: Final answer
    x = 314,777.07

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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.