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Finding the Fourth Proportional to 1,431.07, 2,147.07 and 651.35

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Solution

The fourth proportional to 1,431.07, 2,147.07 and 651.35 is: 977.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.07 : 2,147.07 = 651.35 : x
  2. Step 2: Convert to fraction form
    1,431.07/2,147.07 = 651.35/x
  3. Step 3: Cross multiply
    1,431.07x = 2,147.07 × 651.35
  4. Step 4: Simplify right side
    1,431.07x = 1,398,494.04
  5. Step 5: Solve for x
    x = 1,398,494.04/1,431.07
  6. Step 6: Final answer
    x = 977.24

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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.