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Finding the Fourth Proportional to 553, 831.30 and 512.92

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Solution

The fourth proportional to 553, 831.30 and 512.92 is: 771.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    553 : 831.30 = 512.92 : x
  2. Step 2: Convert to fraction form
    553/831.30 = 512.92/x
  3. Step 3: Cross multiply
    553x = 831.30 × 512.92
  4. Step 4: Simplify right side
    553x = 426,390.40
  5. Step 5: Solve for x
    x = 426,390.40/553
  6. Step 6: Final answer
    x = 771.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.