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Finding the Fourth Proportional to 343,887.40, 515,831.10 and 338,638.60

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Solution

The fourth proportional to 343,887.40, 515,831.10 and 338,638.60 is: 507,957.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,887.40 : 515,831.10 = 338,638.60 : x
  2. Step 2: Convert to fraction form
    343,887.40/515,831.10 = 338,638.60/x
  3. Step 3: Cross multiply
    343,887.40x = 515,831.10 × 338,638.60
  4. Step 4: Simplify right side
    343,887.40x = 174,680,321,540.46
  5. Step 5: Solve for x
    x = 174,680,321,540.46/343,887.40
  6. Step 6: Final answer
    x = 507,957.90

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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.