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Finding the Fourth Proportional to 1,425.14, 2,137.07 and 655.86

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Solution

The fourth proportional to 1,425.14, 2,137.07 and 655.86 is: 983.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.14 : 2,137.07 = 655.86 : x
  2. Step 2: Convert to fraction form
    1,425.14/2,137.07 = 655.86/x
  3. Step 3: Cross multiply
    1,425.14x = 2,137.07 × 655.86
  4. Step 4: Simplify right side
    1,425.14x = 1,401,618.73
  5. Step 5: Solve for x
    x = 1,401,618.73/1,425.14
  6. Step 6: Final answer
    x = 983.50

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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.