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Finding the Fourth Proportional to 1,400.84, 2,101.01 and 426.71

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Solution

The fourth proportional to 1,400.84, 2,101.01 and 426.71 is: 639.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.84 : 2,101.01 = 426.71 : x
  2. Step 2: Convert to fraction form
    1,400.84/2,101.01 = 426.71/x
  3. Step 3: Cross multiply
    1,400.84x = 2,101.01 × 426.71
  4. Step 4: Simplify right side
    1,400.84x = 896,509.34
  5. Step 5: Solve for x
    x = 896,509.34/1,400.84
  6. Step 6: Final answer
    x = 639.98

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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.