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Finding the Fourth Proportional to 978,536.80, 1,467,805.20 and 447,095.80

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Solution

The fourth proportional to 978,536.80, 1,467,805.20 and 447,095.80 is: 670,643.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,536.80 : 1,467,805.20 = 447,095.80 : x
  2. Step 2: Convert to fraction form
    978,536.80/1,467,805.20 = 447,095.80/x
  3. Step 3: Cross multiply
    978,536.80x = 1,467,805.20 × 447,095.80
  4. Step 4: Simplify right side
    978,536.80x = 656,249,540,138.16
  5. Step 5: Solve for x
    x = 656,249,540,138.16/978,536.80
  6. Step 6: Final answer
    x = 670,643.70

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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.