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Finding the Fourth Proportional to 954.99, 1,319.49 and 918.54

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Solution

The fourth proportional to 954.99, 1,319.49 and 918.54 is: 1,269.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.99 : 1,319.49 = 918.54 : x
  2. Step 2: Convert to fraction form
    954.99/1,319.49 = 918.54/x
  3. Step 3: Cross multiply
    954.99x = 1,319.49 × 918.54
  4. Step 4: Simplify right side
    954.99x = 1,212,004.34
  5. Step 5: Solve for x
    x = 1,212,004.34/954.99
  6. Step 6: Final answer
    x = 1,269.13

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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.