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Finding the Fourth Proportional to 787.15, 1,086.25 and 433.07

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Solution

The fourth proportional to 787.15, 1,086.25 and 433.07 is: 597.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.15 : 1,086.25 = 433.07 : x
  2. Step 2: Convert to fraction form
    787.15/1,086.25 = 433.07/x
  3. Step 3: Cross multiply
    787.15x = 1,086.25 × 433.07
  4. Step 4: Simplify right side
    787.15x = 470,422.29
  5. Step 5: Solve for x
    x = 470,422.29/787.15
  6. Step 6: Final answer
    x = 597.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.