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Finding the Fourth Proportional to 480,792.32, 721,291.52 and 143,859.20

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Solution

The fourth proportional to 480,792.32, 721,291.52 and 143,859.20 is: 215,819.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,792.32 : 721,291.52 = 143,859.20 : x
  2. Step 2: Convert to fraction form
    480,792.32/721,291.52 = 143,859.20/x
  3. Step 3: Cross multiply
    480,792.32x = 721,291.52 × 143,859.20
  4. Step 4: Simplify right side
    480,792.32x = 103,764,421,033.98
  5. Step 5: Solve for x
    x = 103,764,421,033.98/480,792.32
  6. Step 6: Final answer
    x = 215,819.63

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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.