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Finding the Fourth Proportional to 978,338.80, 1,467,508.20 and 891,247.60

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Solution

The fourth proportional to 978,338.80, 1,467,508.20 and 891,247.60 is: 1,336,871.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,338.80 : 1,467,508.20 = 891,247.60 : x
  2. Step 2: Convert to fraction form
    978,338.80/1,467,508.20 = 891,247.60/x
  3. Step 3: Cross multiply
    978,338.80x = 1,467,508.20 × 891,247.60
  4. Step 4: Simplify right side
    978,338.80x = 1,307,913,161,230.32
  5. Step 5: Solve for x
    x = 1,307,913,161,230.32/978,338.80
  6. Step 6: Final answer
    x = 1,336,871.40

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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.