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Finding the Fourth Proportional to 655.59, 903.83 and 561.93

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Solution

The fourth proportional to 655.59, 903.83 and 561.93 is: 774.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.59 : 903.83 = 561.93 : x
  2. Step 2: Convert to fraction form
    655.59/903.83 = 561.93/x
  3. Step 3: Cross multiply
    655.59x = 903.83 × 561.93
  4. Step 4: Simplify right side
    655.59x = 507,890.60
  5. Step 5: Solve for x
    x = 507,890.60/655.59
  6. Step 6: Final answer
    x = 774.71

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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.