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Finding the Fourth Proportional to 386,763.10, 579,683.85 and 162,123.10

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Solution

The fourth proportional to 386,763.10, 579,683.85 and 162,123.10 is: 242,991.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,763.10 : 579,683.85 = 162,123.10 : x
  2. Step 2: Convert to fraction form
    386,763.10/579,683.85 = 162,123.10/x
  3. Step 3: Cross multiply
    386,763.10x = 579,683.85 × 162,123.10
  4. Step 4: Simplify right side
    386,763.10x = 93,980,142,781.94
  5. Step 5: Solve for x
    x = 93,980,142,781.94/386,763.10
  6. Step 6: Final answer
    x = 242,991.49

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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.