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Finding the Fourth Proportional to 787.01, 1,086.08 and 432.94

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Solution

The fourth proportional to 787.01, 1,086.08 and 432.94 is: 597.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    787.01 : 1,086.08 = 432.94 : x
  2. Step 2: Convert to fraction form
    787.01/1,086.08 = 432.94/x
  3. Step 3: Cross multiply
    787.01x = 1,086.08 × 432.94
  4. Step 4: Simplify right side
    787.01x = 470,199.88
  5. Step 5: Solve for x
    x = 470,199.88/787.01
  6. Step 6: Final answer
    x = 597.45

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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.