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Finding the Fourth Proportional to 857.84, 1,285.24 and 492.08

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Solution

The fourth proportional to 857.84, 1,285.24 and 492.08 is: 737.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.84 : 1,285.24 = 492.08 : x
  2. Step 2: Convert to fraction form
    857.84/1,285.24 = 492.08/x
  3. Step 3: Cross multiply
    857.84x = 1,285.24 × 492.08
  4. Step 4: Simplify right side
    857.84x = 632,440.90
  5. Step 5: Solve for x
    x = 632,440.90/857.84
  6. Step 6: Final answer
    x = 737.25

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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.