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Finding the Fourth Proportional to 651.55, 895.67 and 561.49

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Solution

The fourth proportional to 651.55, 895.67 and 561.49 is: 771.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.55 : 895.67 = 561.49 : x
  2. Step 2: Convert to fraction form
    651.55/895.67 = 561.49/x
  3. Step 3: Cross multiply
    651.55x = 895.67 × 561.49
  4. Step 4: Simplify right side
    651.55x = 502,909.75
  5. Step 5: Solve for x
    x = 502,909.75/651.55
  6. Step 6: Final answer
    x = 771.87

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.