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Finding the Fourth Proportional to 978,161.20, 1,371,914 and 978,161.20

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Solution

The fourth proportional to 978,161.20, 1,371,914 and 978,161.20 is: 1,371,914

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,161.20 : 1,371,914 = 978,161.20 : x
  2. Step 2: Convert to fraction form
    978,161.20/1,371,914 = 978,161.20/x
  3. Step 3: Cross multiply
    978,161.20x = 1,371,914 × 978,161.20
  4. Step 4: Simplify right side
    978,161.20x = 1,341,953,044,536.80
  5. Step 5: Solve for x
    x = 1,341,953,044,536.80/978,161.20
  6. Step 6: Final answer
    x = 1,371,914

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.