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Finding the Fourth Proportional to 1,335.19, 2,003.43 and 555.79

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Solution

The fourth proportional to 1,335.19, 2,003.43 and 555.79 is: 833.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.19 : 2,003.43 = 555.79 : x
  2. Step 2: Convert to fraction form
    1,335.19/2,003.43 = 555.79/x
  3. Step 3: Cross multiply
    1,335.19x = 2,003.43 × 555.79
  4. Step 4: Simplify right side
    1,335.19x = 1,113,486.36
  5. Step 5: Solve for x
    x = 1,113,486.36/1,335.19
  6. Step 6: Final answer
    x = 833.95

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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.