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Finding the Fourth Proportional to 652,640.20, 978,960.30 and 403,808.20

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Solution

The fourth proportional to 652,640.20, 978,960.30 and 403,808.20 is: 605,712.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,640.20 : 978,960.30 = 403,808.20 : x
  2. Step 2: Convert to fraction form
    652,640.20/978,960.30 = 403,808.20/x
  3. Step 3: Cross multiply
    652,640.20x = 978,960.30 × 403,808.20
  4. Step 4: Simplify right side
    652,640.20x = 395,312,196,614.46
  5. Step 5: Solve for x
    x = 395,312,196,614.46/652,640.20
  6. Step 6: Final answer
    x = 605,712.30

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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.