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Finding the Fourth Proportional to 652,353.40, 978,530.10 and 279,105.40

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Solution

The fourth proportional to 652,353.40, 978,530.10 and 279,105.40 is: 418,658.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,353.40 : 978,530.10 = 279,105.40 : x
  2. Step 2: Convert to fraction form
    652,353.40/978,530.10 = 279,105.40/x
  3. Step 3: Cross multiply
    652,353.40x = 978,530.10 × 279,105.40
  4. Step 4: Simplify right side
    652,353.40x = 273,113,034,972.54
  5. Step 5: Solve for x
    x = 273,113,034,972.54/652,353.40
  6. Step 6: Final answer
    x = 418,658.10

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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.