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Finding the Fourth Proportional to 978,358.40, 1,467,537.60 and 438,613.70

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Solution

The fourth proportional to 978,358.40, 1,467,537.60 and 438,613.70 is: 657,920.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,358.40 : 1,467,537.60 = 438,613.70 : x
  2. Step 2: Convert to fraction form
    978,358.40/1,467,537.60 = 438,613.70/x
  3. Step 3: Cross multiply
    978,358.40x = 1,467,537.60 × 438,613.70
  4. Step 4: Simplify right side
    978,358.40x = 643,682,096,625.12
  5. Step 5: Solve for x
    x = 643,682,096,625.12/978,358.40
  6. Step 6: Final answer
    x = 657,920.55

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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.