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Finding the Fourth Proportional to 426,169.14, 638,478.45 and 248,136.42

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Solution

The fourth proportional to 426,169.14, 638,478.45 and 248,136.42 is: 371,753.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,169.14 : 638,478.45 = 248,136.42 : x
  2. Step 2: Convert to fraction form
    426,169.14/638,478.45 = 248,136.42/x
  3. Step 3: Cross multiply
    426,169.14x = 638,478.45 × 248,136.42
  4. Step 4: Simplify right side
    426,169.14x = 158,429,756,830.15
  5. Step 5: Solve for x
    x = 158,429,756,830.15/426,169.14
  6. Step 6: Final answer
    x = 371,753.24

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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.