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Finding the Fourth Proportional to 656.47, 983.78 and 348.47

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Solution

The fourth proportional to 656.47, 983.78 and 348.47 is: 522.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.47 : 983.78 = 348.47 : x
  2. Step 2: Convert to fraction form
    656.47/983.78 = 348.47/x
  3. Step 3: Cross multiply
    656.47x = 983.78 × 348.47
  4. Step 4: Simplify right side
    656.47x = 342,816.15
  5. Step 5: Solve for x
    x = 342,816.15/656.47
  6. Step 6: Final answer
    x = 522.21

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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.