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Finding the Fourth Proportional to 954.77, 1,317.58 and 561.79

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Solution

The fourth proportional to 954.77, 1,317.58 and 561.79 is: 775.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.77 : 1,317.58 = 561.79 : x
  2. Step 2: Convert to fraction form
    954.77/1,317.58 = 561.79/x
  3. Step 3: Cross multiply
    954.77x = 1,317.58 × 561.79
  4. Step 4: Simplify right side
    954.77x = 740,203.27
  5. Step 5: Solve for x
    x = 740,203.27/954.77
  6. Step 6: Final answer
    x = 775.27

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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.