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Finding the Fourth Proportional to 652,113.80, 978,170.70 and 400,171.40

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Solution

The fourth proportional to 652,113.80, 978,170.70 and 400,171.40 is: 600,257.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,113.80 : 978,170.70 = 400,171.40 : x
  2. Step 2: Convert to fraction form
    652,113.80/978,170.70 = 400,171.40/x
  3. Step 3: Cross multiply
    652,113.80x = 978,170.70 × 400,171.40
  4. Step 4: Simplify right side
    652,113.80x = 391,435,938,457.98
  5. Step 5: Solve for x
    x = 391,435,938,457.98/652,113.80
  6. Step 6: Final answer
    x = 600,257.10

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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.