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Finding the Fourth Proportional to 831.83, 1,148.15 and 583.21

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Solution

The fourth proportional to 831.83, 1,148.15 and 583.21 is: 805.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.83 : 1,148.15 = 583.21 : x
  2. Step 2: Convert to fraction form
    831.83/1,148.15 = 583.21/x
  3. Step 3: Cross multiply
    831.83x = 1,148.15 × 583.21
  4. Step 4: Simplify right side
    831.83x = 669,615.45
  5. Step 5: Solve for x
    x = 669,615.45/831.83
  6. Step 6: Final answer
    x = 805.00

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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.