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Finding the Fourth Proportional to 831.65, 1,146.79 and 595.55

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Solution

The fourth proportional to 831.65, 1,146.79 and 595.55 is: 821.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.65 : 1,146.79 = 595.55 : x
  2. Step 2: Convert to fraction form
    831.65/1,146.79 = 595.55/x
  3. Step 3: Cross multiply
    831.65x = 1,146.79 × 595.55
  4. Step 4: Simplify right side
    831.65x = 682,970.78
  5. Step 5: Solve for x
    x = 682,970.78/831.65
  6. Step 6: Final answer
    x = 821.22

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1.5x scale

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.