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Finding the Fourth Proportional to 978,140.70, 1,467,211.05 and 659,276.10

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Solution

The fourth proportional to 978,140.70, 1,467,211.05 and 659,276.10 is: 988,914.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,140.70 : 1,467,211.05 = 659,276.10 : x
  2. Step 2: Convert to fraction form
    978,140.70/1,467,211.05 = 659,276.10/x
  3. Step 3: Cross multiply
    978,140.70x = 1,467,211.05 × 659,276.10
  4. Step 4: Simplify right side
    978,140.70x = 967,297,178,920.91
  5. Step 5: Solve for x
    x = 967,297,178,920.91/978,140.70
  6. Step 6: Final answer
    x = 988,914.15

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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.