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Finding the Fourth Proportional to 424,069.94, 636,183.71 and 139,780.45

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Solution

The fourth proportional to 424,069.94, 636,183.71 and 139,780.45 is: 209,696.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,069.94 : 636,183.71 = 139,780.45 : x
  2. Step 2: Convert to fraction form
    424,069.94/636,183.71 = 139,780.45/x
  3. Step 3: Cross multiply
    424,069.94x = 636,183.71 × 139,780.45
  4. Step 4: Simplify right side
    424,069.94x = 88,926,043,006.50
  5. Step 5: Solve for x
    x = 88,926,043,006.50/424,069.94
  6. Step 6: Final answer
    x = 209,696.64

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1.5x scale

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.