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Finding the Fourth Proportional to 1,326.35, 1,989.95 and 402.01

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Solution

The fourth proportional to 1,326.35, 1,989.95 and 402.01 is: 603.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.35 : 1,989.95 = 402.01 : x
  2. Step 2: Convert to fraction form
    1,326.35/1,989.95 = 402.01/x
  3. Step 3: Cross multiply
    1,326.35x = 1,989.95 × 402.01
  4. Step 4: Simplify right side
    1,326.35x = 799,972.81
  5. Step 5: Solve for x
    x = 799,972.81/1,326.35
  6. Step 6: Final answer
    x = 603.14

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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.