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Finding the Fourth Proportional to 343,887.80, 515,831.70 and 284,790.20

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Solution

The fourth proportional to 343,887.80, 515,831.70 and 284,790.20 is: 427,185.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,887.80 : 515,831.70 = 284,790.20 : x
  2. Step 2: Convert to fraction form
    343,887.80/515,831.70 = 284,790.20/x
  3. Step 3: Cross multiply
    343,887.80x = 515,831.70 × 284,790.20
  4. Step 4: Simplify right side
    343,887.80x = 146,903,813,009.34
  5. Step 5: Solve for x
    x = 146,903,813,009.34/343,887.80
  6. Step 6: Final answer
    x = 427,185.30

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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.