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Finding the Fourth Proportional to 861,889.64, 1,189,396.53 and 474,697.69

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Solution

The fourth proportional to 861,889.64, 1,189,396.53 and 474,697.69 is: 655,076.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,889.64 : 1,189,396.53 = 474,697.69 : x
  2. Step 2: Convert to fraction form
    861,889.64/1,189,396.53 = 474,697.69/x
  3. Step 3: Cross multiply
    861,889.64x = 1,189,396.53 × 474,697.69
  4. Step 4: Simplify right side
    861,889.64x = 564,603,786,991.79
  5. Step 5: Solve for x
    x = 564,603,786,991.79/861,889.64
  6. Step 6: Final answer
    x = 655,076.66

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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.