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Finding the Fourth Proportional to 954.10, 1,316.78 and 561.16

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Solution

The fourth proportional to 954.10, 1,316.78 and 561.16 is: 774.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.10 : 1,316.78 = 561.16 : x
  2. Step 2: Convert to fraction form
    954.10/1,316.78 = 561.16/x
  3. Step 3: Cross multiply
    954.10x = 1,316.78 × 561.16
  4. Step 4: Simplify right side
    954.10x = 738,924.26
  5. Step 5: Solve for x
    x = 738,924.26/954.10
  6. Step 6: Final answer
    x = 774.47

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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.