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Finding the Fourth Proportional to 978,765.16, 1,351,170.72 and 656,357.56

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Solution

The fourth proportional to 978,765.16, 1,351,170.72 and 656,357.56 is: 906,091.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,765.16 : 1,351,170.72 = 656,357.56 : x
  2. Step 2: Convert to fraction form
    978,765.16/1,351,170.72 = 656,357.56/x
  3. Step 3: Cross multiply
    978,765.16x = 1,351,170.72 × 656,357.56
  4. Step 4: Simplify right side
    978,765.16x = 886,851,116,922.64
  5. Step 5: Solve for x
    x = 886,851,116,922.64/978,765.16
  6. Step 6: Final answer
    x = 906,091.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.