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Finding the Fourth Proportional to 978,448.20, 1,467,672.30 and 810,158.55

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Solution

The fourth proportional to 978,448.20, 1,467,672.30 and 810,158.55 is: 1,215,237.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,448.20 : 1,467,672.30 = 810,158.55 : x
  2. Step 2: Convert to fraction form
    978,448.20/1,467,672.30 = 810,158.55/x
  3. Step 3: Cross multiply
    978,448.20x = 1,467,672.30 × 810,158.55
  4. Step 4: Simplify right side
    978,448.20x = 1,189,047,262,443.17
  5. Step 5: Solve for x
    x = 1,189,047,262,443.17/978,448.20
  6. Step 6: Final answer
    x = 1,215,237.83

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1.5x scale

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.