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Finding the Fourth Proportional to 653.02, 978.68 and 498.38

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Solution

The fourth proportional to 653.02, 978.68 and 498.38 is: 746.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.02 : 978.68 = 498.38 : x
  2. Step 2: Convert to fraction form
    653.02/978.68 = 498.38/x
  3. Step 3: Cross multiply
    653.02x = 978.68 × 498.38
  4. Step 4: Simplify right side
    653.02x = 487,754.54
  5. Step 5: Solve for x
    x = 487,754.54/653.02
  6. Step 6: Final answer
    x = 746.92

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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.