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Finding the Fourth Proportional to 978,761.16, 1,351,165.20 and 656,353.56

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Solution

The fourth proportional to 978,761.16, 1,351,165.20 and 656,353.56 is: 906,086.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,761.16 : 1,351,165.20 = 656,353.56 : x
  2. Step 2: Convert to fraction form
    978,761.16/1,351,165.20 = 656,353.56/x
  3. Step 3: Cross multiply
    978,761.16x = 1,351,165.20 × 656,353.56
  4. Step 4: Simplify right side
    978,761.16x = 886,842,089,168.11
  5. Step 5: Solve for x
    x = 886,842,089,168.11/978,761.16
  6. Step 6: Final answer
    x = 906,086.31

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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.