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Finding the Fourth Proportional to 660,674.50, 991,159.13 and 211,422.35

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Solution

The fourth proportional to 660,674.50, 991,159.13 and 211,422.35 is: 317,180.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,674.50 : 991,159.13 = 211,422.35 : x
  2. Step 2: Convert to fraction form
    660,674.50/991,159.13 = 211,422.35/x
  3. Step 3: Cross multiply
    660,674.50x = 991,159.13 × 211,422.35
  4. Step 4: Simplify right side
    660,674.50x = 209,553,192,488.56
  5. Step 5: Solve for x
    x = 209,553,192,488.56/660,674.50
  6. Step 6: Final answer
    x = 317,180.69

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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.