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Finding the Fourth Proportional to 373,831.40, 515,880.70 and 212,682.98

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Solution

The fourth proportional to 373,831.40, 515,880.70 and 212,682.98 is: 293,498.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,831.40 : 515,880.70 = 212,682.98 : x
  2. Step 2: Convert to fraction form
    373,831.40/515,880.70 = 212,682.98/x
  3. Step 3: Cross multiply
    373,831.40x = 515,880.70 × 212,682.98
  4. Step 4: Simplify right side
    373,831.40x = 109,719,045,358.48
  5. Step 5: Solve for x
    x = 109,719,045,358.48/373,831.40
  6. Step 6: Final answer
    x = 293,498.74

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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.