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Finding the Fourth Proportional to 371,289.04, 512,361.15 and 228,021.40

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Solution

The fourth proportional to 371,289.04, 512,361.15 and 228,021.40 is: 314,658.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,289.04 : 512,361.15 = 228,021.40 : x
  2. Step 2: Convert to fraction form
    371,289.04/512,361.15 = 228,021.40/x
  3. Step 3: Cross multiply
    371,289.04x = 512,361.15 × 228,021.40
  4. Step 4: Simplify right side
    371,289.04x = 116,829,307,955.00
  5. Step 5: Solve for x
    x = 116,829,307,955.00/371,289.04
  6. Step 6: Final answer
    x = 314,658.65

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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.