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Finding the Fourth Proportional to 652,141.20, 978,211.80 and 178,874.40

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Solution

The fourth proportional to 652,141.20, 978,211.80 and 178,874.40 is: 268,311.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,141.20 : 978,211.80 = 178,874.40 : x
  2. Step 2: Convert to fraction form
    652,141.20/978,211.80 = 178,874.40/x
  3. Step 3: Cross multiply
    652,141.20x = 978,211.80 × 178,874.40
  4. Step 4: Simplify right side
    652,141.20x = 174,977,048,797.92
  5. Step 5: Solve for x
    x = 174,977,048,797.92/652,141.20
  6. Step 6: Final answer
    x = 268,311.60

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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.