Home / 660,665.10-991,145.33-211,412.95

Finding the Fourth Proportional to 660,665.10, 991,145.33 and 211,412.95

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Solution

The fourth proportional to 660,665.10, 991,145.33 and 211,412.95 is: 317,166.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,665.10 : 991,145.33 = 211,412.95 : x
  2. Step 2: Convert to fraction form
    660,665.10/991,145.33 = 211,412.95/x
  3. Step 3: Cross multiply
    660,665.10x = 991,145.33 × 211,412.95
  4. Step 4: Simplify right side
    660,665.10x = 209,540,955,351.89
  5. Step 5: Solve for x
    x = 209,540,955,351.89/660,665.10
  6. Step 6: Final answer
    x = 317,166.68

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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.