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Finding the Fourth Proportional to 296,960.60, 445,440.90 and 86,619.80

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Solution

The fourth proportional to 296,960.60, 445,440.90 and 86,619.80 is: 129,929.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,960.60 : 445,440.90 = 86,619.80 : x
  2. Step 2: Convert to fraction form
    296,960.60/445,440.90 = 86,619.80/x
  3. Step 3: Cross multiply
    296,960.60x = 445,440.90 × 86,619.80
  4. Step 4: Simplify right side
    296,960.60x = 38,584,001,669.82
  5. Step 5: Solve for x
    x = 38,584,001,669.82/296,960.60
  6. Step 6: Final answer
    x = 129,929.70

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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.