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Finding the Fourth Proportional to 656.96, 987.68 and 529.60

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Solution

The fourth proportional to 656.96, 987.68 and 529.60 is: 796.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.96 : 987.68 = 529.60 : x
  2. Step 2: Convert to fraction form
    656.96/987.68 = 529.60/x
  3. Step 3: Cross multiply
    656.96x = 987.68 × 529.60
  4. Step 4: Simplify right side
    656.96x = 523,075.33
  5. Step 5: Solve for x
    x = 523,075.33/656.96
  6. Step 6: Final answer
    x = 796.21

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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.