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Finding the Fourth Proportional to 978,176.20, 1,371,935 and 978,176.20

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Solution

The fourth proportional to 978,176.20, 1,371,935 and 978,176.20 is: 1,371,935

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,176.20 : 1,371,935 = 978,176.20 : x
  2. Step 2: Convert to fraction form
    978,176.20/1,371,935 = 978,176.20/x
  3. Step 3: Cross multiply
    978,176.20x = 1,371,935 × 978,176.20
  4. Step 4: Simplify right side
    978,176.20x = 1,341,994,164,947
  5. Step 5: Solve for x
    x = 1,341,994,164,947/978,176.20
  6. Step 6: Final answer
    x = 1,371,935

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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.