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Finding the Fourth Proportional to 1,580.51, 2,367.59 and 787.48

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Solution

The fourth proportional to 1,580.51, 2,367.59 and 787.48 is: 1,179.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.51 : 2,367.59 = 787.48 : x
  2. Step 2: Convert to fraction form
    1,580.51/2,367.59 = 787.48/x
  3. Step 3: Cross multiply
    1,580.51x = 2,367.59 × 787.48
  4. Step 4: Simplify right side
    1,580.51x = 1,864,433.22
  5. Step 5: Solve for x
    x = 1,864,433.22/1,580.51
  6. Step 6: Final answer
    x = 1,179.64

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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.