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Finding the Fourth Proportional to 297,122.76, 445,640.30 and 86,704.20

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Solution

The fourth proportional to 297,122.76, 445,640.30 and 86,704.20 is: 130,043.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,122.76 : 445,640.30 = 86,704.20 : x
  2. Step 2: Convert to fraction form
    297,122.76/445,640.30 = 86,704.20/x
  3. Step 3: Cross multiply
    297,122.76x = 445,640.30 × 86,704.20
  4. Step 4: Simplify right side
    297,122.76x = 38,638,885,699.26
  5. Step 5: Solve for x
    x = 38,638,885,699.26/297,122.76
  6. Step 6: Final answer
    x = 130,043.51

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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.