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Finding the Fourth Proportional to 787.69, 1,179.71 and 603.68

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Solution

The fourth proportional to 787.69, 1,179.71 and 603.68 is: 904.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.69 : 1,179.71 = 603.68 : x
  2. Step 2: Convert to fraction form
    787.69/1,179.71 = 603.68/x
  3. Step 3: Cross multiply
    787.69x = 1,179.71 × 603.68
  4. Step 4: Simplify right side
    787.69x = 712,164.31
  5. Step 5: Solve for x
    x = 712,164.31/787.69
  6. Step 6: Final answer
    x = 904.12

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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.