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Finding the Fourth Proportional to 555,074.14, 766,020.90 and 340,172.70

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Solution

The fourth proportional to 555,074.14, 766,020.90 and 340,172.70 is: 469,449.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,074.14 : 766,020.90 = 340,172.70 : x
  2. Step 2: Convert to fraction form
    555,074.14/766,020.90 = 340,172.70/x
  3. Step 3: Cross multiply
    555,074.14x = 766,020.90 × 340,172.70
  4. Step 4: Simplify right side
    555,074.14x = 260,579,397,809.43
  5. Step 5: Solve for x
    x = 260,579,397,809.43/555,074.14
  6. Step 6: Final answer
    x = 469,449.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.