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Finding the Fourth Proportional to 653,093.80, 978,603.90 and 485,132.20

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Solution

The fourth proportional to 653,093.80, 978,603.90 and 485,132.20 is: 726,928.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,093.80 : 978,603.90 = 485,132.20 : x
  2. Step 2: Convert to fraction form
    653,093.80/978,603.90 = 485,132.20/x
  3. Step 3: Cross multiply
    653,093.80x = 978,603.90 × 485,132.20
  4. Step 4: Simplify right side
    653,093.80x = 474,752,262,935.58
  5. Step 5: Solve for x
    x = 474,752,262,935.58/653,093.80
  6. Step 6: Final answer
    x = 726,928.14

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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.