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Finding the Fourth Proportional to 978,368.40, 1,467,552.60 and 418,496.40

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Solution

The fourth proportional to 978,368.40, 1,467,552.60 and 418,496.40 is: 627,744.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,368.40 : 1,467,552.60 = 418,496.40 : x
  2. Step 2: Convert to fraction form
    978,368.40/1,467,552.60 = 418,496.40/x
  3. Step 3: Cross multiply
    978,368.40x = 1,467,552.60 × 418,496.40
  4. Step 4: Simplify right side
    978,368.40x = 614,165,479,910.64
  5. Step 5: Solve for x
    x = 614,165,479,910.64/978,368.40
  6. Step 6: Final answer
    x = 627,744.60

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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.