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Finding the Fourth Proportional to 386,737.40, 580,106.10 and 220,849.40

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Solution

The fourth proportional to 386,737.40, 580,106.10 and 220,849.40 is: 331,274.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,737.40 : 580,106.10 = 220,849.40 : x
  2. Step 2: Convert to fraction form
    386,737.40/580,106.10 = 220,849.40/x
  3. Step 3: Cross multiply
    386,737.40x = 580,106.10 × 220,849.40
  4. Step 4: Simplify right side
    386,737.40x = 128,116,084,121.34
  5. Step 5: Solve for x
    x = 128,116,084,121.34/386,737.40
  6. Step 6: Final answer
    x = 331,274.10

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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.