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Finding the Fourth Proportional to 953.96, 1,316.62 and 561

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Solution

The fourth proportional to 953.96, 1,316.62 and 561 is: 774.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.96 : 1,316.62 = 561 : x
  2. Step 2: Convert to fraction form
    953.96/1,316.62 = 561/x
  3. Step 3: Cross multiply
    953.96x = 1,316.62 × 561
  4. Step 4: Simplify right side
    953.96x = 738,623.82
  5. Step 5: Solve for x
    x = 738,623.82/953.96
  6. Step 6: Final answer
    x = 774.27

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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.