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Finding the Fourth Proportional to 424,046.70, 636,133.02 and 139,684.71

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Solution

The fourth proportional to 424,046.70, 636,133.02 and 139,684.71 is: 209,547.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,046.70 : 636,133.02 = 139,684.71 : x
  2. Step 2: Convert to fraction form
    424,046.70/636,133.02 = 139,684.71/x
  3. Step 3: Cross multiply
    424,046.70x = 636,133.02 × 139,684.71
  4. Step 4: Simplify right side
    424,046.70x = 88,858,056,420.12
  5. Step 5: Solve for x
    x = 88,858,056,420.12/424,046.70
  6. Step 6: Final answer
    x = 209,547.81

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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.