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Finding the Fourth Proportional to 988,917.40, 1,483,376.10 and 978,419.80

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Solution

The fourth proportional to 988,917.40, 1,483,376.10 and 978,419.80 is: 1,467,629.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    988,917.40 : 1,483,376.10 = 978,419.80 : x
  2. Step 2: Convert to fraction form
    988,917.40/1,483,376.10 = 978,419.80/x
  3. Step 3: Cross multiply
    988,917.40x = 1,483,376.10 × 978,419.80
  4. Step 4: Simplify right side
    988,917.40x = 1,451,364,547,086.78
  5. Step 5: Solve for x
    x = 1,451,364,547,086.78/988,917.40
  6. Step 6: Final answer
    x = 1,467,629.70

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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.