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Finding the Fourth Proportional to 1,335.71, 2,004.80 and 720.02

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Solution

The fourth proportional to 1,335.71, 2,004.80 and 720.02 is: 1,080.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.71 : 2,004.80 = 720.02 : x
  2. Step 2: Convert to fraction form
    1,335.71/2,004.80 = 720.02/x
  3. Step 3: Cross multiply
    1,335.71x = 2,004.80 × 720.02
  4. Step 4: Simplify right side
    1,335.71x = 1,443,497.51
  5. Step 5: Solve for x
    x = 1,443,497.51/1,335.71
  6. Step 6: Final answer
    x = 1,080.69

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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.