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Finding the Fourth Proportional to 734.48, 1,013.28 and 486.08

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Solution

The fourth proportional to 734.48, 1,013.28 and 486.08 is: 670.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.48 : 1,013.28 = 486.08 : x
  2. Step 2: Convert to fraction form
    734.48/1,013.28 = 486.08/x
  3. Step 3: Cross multiply
    734.48x = 1,013.28 × 486.08
  4. Step 4: Simplify right side
    734.48x = 492,535.14
  5. Step 5: Solve for x
    x = 492,535.14/734.48
  6. Step 6: Final answer
    x = 670.59

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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.