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Finding the Fourth Proportional to 296,957.80, 445,538.70 and 86,626.60

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Solution

The fourth proportional to 296,957.80, 445,538.70 and 86,626.60 is: 129,969.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,957.80 : 445,538.70 = 86,626.60 : x
  2. Step 2: Convert to fraction form
    296,957.80/445,538.70 = 86,626.60/x
  3. Step 3: Cross multiply
    296,957.80x = 445,538.70 × 86,626.60
  4. Step 4: Simplify right side
    296,957.80x = 38,595,502,749.42
  5. Step 5: Solve for x
    x = 38,595,502,749.42/296,957.80
  6. Step 6: Final answer
    x = 129,969.65

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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.