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Finding the Fourth Proportional to 651.39, 975.81 and 505.05

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Solution

The fourth proportional to 651.39, 975.81 and 505.05 is: 756.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.39 : 975.81 = 505.05 : x
  2. Step 2: Convert to fraction form
    651.39/975.81 = 505.05/x
  3. Step 3: Cross multiply
    651.39x = 975.81 × 505.05
  4. Step 4: Simplify right side
    651.39x = 492,832.84
  5. Step 5: Solve for x
    x = 492,832.84/651.39
  6. Step 6: Final answer
    x = 756.59

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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.