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Finding the Fourth Proportional to 954.99, 1,425.60 and 831.94

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Solution

The fourth proportional to 954.99, 1,425.60 and 831.94 is: 1,241.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.99 : 1,425.60 = 831.94 : x
  2. Step 2: Convert to fraction form
    954.99/1,425.60 = 831.94/x
  3. Step 3: Cross multiply
    954.99x = 1,425.60 × 831.94
  4. Step 4: Simplify right side
    954.99x = 1,186,010.10
  5. Step 5: Solve for x
    x = 1,186,010.10/954.99
  6. Step 6: Final answer
    x = 1,241.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.