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Finding the Fourth Proportional to 260,919.51, 391,373.09 and 83,428.07

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Solution

The fourth proportional to 260,919.51, 391,373.09 and 83,428.07 is: 125,140.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,919.51 : 391,373.09 = 83,428.07 : x
  2. Step 2: Convert to fraction form
    260,919.51/391,373.09 = 83,428.07/x
  3. Step 3: Cross multiply
    260,919.51x = 391,373.09 × 83,428.07
  4. Step 4: Simplify right side
    260,919.51x = 32,651,499,174.63
  5. Step 5: Solve for x
    x = 32,651,499,174.63/260,919.51
  6. Step 6: Final answer
    x = 125,140.12

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1.5x scale

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.