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Finding the Fourth Proportional to 515,242.99, 771,831.13 and 262,513.27

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Solution

The fourth proportional to 515,242.99, 771,831.13 and 262,513.27 is: 393,243.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,242.99 : 771,831.13 = 262,513.27 : x
  2. Step 2: Convert to fraction form
    515,242.99/771,831.13 = 262,513.27/x
  3. Step 3: Cross multiply
    515,242.99x = 771,831.13 × 262,513.27
  4. Step 4: Simplify right side
    515,242.99x = 202,615,913,824.10
  5. Step 5: Solve for x
    x = 202,615,913,824.10/515,242.99
  6. Step 6: Final answer
    x = 393,243.42

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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.