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Finding the Fourth Proportional to 386,510.90, 579,737.55 and 161,813.30

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Solution

The fourth proportional to 386,510.90, 579,737.55 and 161,813.30 is: 242,707.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,510.90 : 579,737.55 = 161,813.30 : x
  2. Step 2: Convert to fraction form
    386,510.90/579,737.55 = 161,813.30/x
  3. Step 3: Cross multiply
    386,510.90x = 579,737.55 × 161,813.30
  4. Step 4: Simplify right side
    386,510.90x = 93,809,246,099.42
  5. Step 5: Solve for x
    x = 93,809,246,099.42/386,510.90
  6. Step 6: Final answer
    x = 242,707.89

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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.