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Finding the Fourth Proportional to 655.68, 985.60 and 564.80

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Solution

The fourth proportional to 655.68, 985.60 and 564.80 is: 848.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.68 : 985.60 = 564.80 : x
  2. Step 2: Convert to fraction form
    655.68/985.60 = 564.80/x
  3. Step 3: Cross multiply
    655.68x = 985.60 × 564.80
  4. Step 4: Simplify right side
    655.68x = 556,666.88
  5. Step 5: Solve for x
    x = 556,666.88/655.68
  6. Step 6: Final answer
    x = 848.99

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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.