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Finding the Fourth Proportional to 1,418.67, 2,130.02 and 803.58

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Solution

The fourth proportional to 1,418.67, 2,130.02 and 803.58 is: 1,206.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.67 : 2,130.02 = 803.58 : x
  2. Step 2: Convert to fraction form
    1,418.67/2,130.02 = 803.58/x
  3. Step 3: Cross multiply
    1,418.67x = 2,130.02 × 803.58
  4. Step 4: Simplify right side
    1,418.67x = 1,711,637.45
  5. Step 5: Solve for x
    x = 1,711,637.45/1,418.67
  6. Step 6: Final answer
    x = 1,206.51

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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.