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Finding the Fourth Proportional to 371,969.21, 513,411.67 and 228,857.40

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Solution

The fourth proportional to 371,969.21, 513,411.67 and 228,857.40 is: 315,881.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,969.21 : 513,411.67 = 228,857.40 : x
  2. Step 2: Convert to fraction form
    371,969.21/513,411.67 = 228,857.40/x
  3. Step 3: Cross multiply
    371,969.21x = 513,411.67 × 228,857.40
  4. Step 4: Simplify right side
    371,969.21x = 117,498,059,925.86
  5. Step 5: Solve for x
    x = 117,498,059,925.86/371,969.21
  6. Step 6: Final answer
    x = 315,881.14

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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.