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Finding the Fourth Proportional to 831.30, 1,145.98 and 581.84

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Solution

The fourth proportional to 831.30, 1,145.98 and 581.84 is: 802.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.30 : 1,145.98 = 581.84 : x
  2. Step 2: Convert to fraction form
    831.30/1,145.98 = 581.84/x
  3. Step 3: Cross multiply
    831.30x = 1,145.98 × 581.84
  4. Step 4: Simplify right side
    831.30x = 666,777.00
  5. Step 5: Solve for x
    x = 666,777.00/831.30
  6. Step 6: Final answer
    x = 802.09

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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.