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Finding the Fourth Proportional to 660,770.52, 991,221.12 and 211,378.56

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Solution

The fourth proportional to 660,770.52, 991,221.12 and 211,378.56 is: 317,088.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,770.52 : 991,221.12 = 211,378.56 : x
  2. Step 2: Convert to fraction form
    660,770.52/991,221.12 = 211,378.56/x
  3. Step 3: Cross multiply
    660,770.52x = 991,221.12 × 211,378.56
  4. Step 4: Simplify right side
    660,770.52x = 209,522,892,987.19
  5. Step 5: Solve for x
    x = 209,522,892,987.19/660,770.52
  6. Step 6: Final answer
    x = 317,088.74

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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.