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Finding the Fourth Proportional to 978,428.70, 1,467,643.05 and 473,231.70

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Solution

The fourth proportional to 978,428.70, 1,467,643.05 and 473,231.70 is: 709,847.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,428.70 : 1,467,643.05 = 473,231.70 : x
  2. Step 2: Convert to fraction form
    978,428.70/1,467,643.05 = 473,231.70/x
  3. Step 3: Cross multiply
    978,428.70x = 1,467,643.05 × 473,231.70
  4. Step 4: Simplify right side
    978,428.70x = 694,535,215,544.69
  5. Step 5: Solve for x
    x = 694,535,215,544.69/978,428.70
  6. Step 6: Final answer
    x = 709,847.55

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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.