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Finding the Fourth Proportional to 787.08, 1,180.88 and 651.52

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Solution

The fourth proportional to 787.08, 1,180.88 and 651.52 is: 977.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.08 : 1,180.88 = 651.52 : x
  2. Step 2: Convert to fraction form
    787.08/1,180.88 = 651.52/x
  3. Step 3: Cross multiply
    787.08x = 1,180.88 × 651.52
  4. Step 4: Simplify right side
    787.08x = 769,366.94
  5. Step 5: Solve for x
    x = 769,366.94/787.08
  6. Step 6: Final answer
    x = 977.50

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1.5x scale

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.