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Finding the Fourth Proportional to 978,390.60, 1,467,585.90 and 901,408.20

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Solution

The fourth proportional to 978,390.60, 1,467,585.90 and 901,408.20 is: 1,352,112.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,390.60 : 1,467,585.90 = 901,408.20 : x
  2. Step 2: Convert to fraction form
    978,390.60/1,467,585.90 = 901,408.20/x
  3. Step 3: Cross multiply
    978,390.60x = 1,467,585.90 × 901,408.20
  4. Step 4: Simplify right side
    978,390.60x = 1,322,893,964,464.38
  5. Step 5: Solve for x
    x = 1,322,893,964,464.38/978,390.60
  6. Step 6: Final answer
    x = 1,352,112.30

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Similar ratio
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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.