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Finding the Fourth Proportional to 903.12, 1,357.12 and 492.56

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Solution

The fourth proportional to 903.12, 1,357.12 and 492.56 is: 740.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.12 : 1,357.12 = 492.56 : x
  2. Step 2: Convert to fraction form
    903.12/1,357.12 = 492.56/x
  3. Step 3: Cross multiply
    903.12x = 1,357.12 × 492.56
  4. Step 4: Simplify right side
    903.12x = 668,463.03
  5. Step 5: Solve for x
    x = 668,463.03/903.12
  6. Step 6: Final answer
    x = 740.17

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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.