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Finding the Fourth Proportional to 652,121.10, 978,181.65 and 368,685.90

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Solution

The fourth proportional to 652,121.10, 978,181.65 and 368,685.90 is: 553,028.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,121.10 : 978,181.65 = 368,685.90 : x
  2. Step 2: Convert to fraction form
    652,121.10/978,181.65 = 368,685.90/x
  3. Step 3: Cross multiply
    652,121.10x = 978,181.65 × 368,685.90
  4. Step 4: Simplify right side
    652,121.10x = 360,641,781,993.74
  5. Step 5: Solve for x
    x = 360,641,781,993.74/652,121.10
  6. Step 6: Final answer
    x = 553,028.85

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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.