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Finding the Fourth Proportional to 424,486.50, 636,729.74 and 108,943.40

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Solution

The fourth proportional to 424,486.50, 636,729.74 and 108,943.40 is: 163,415.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,486.50 : 636,729.74 = 108,943.40 : x
  2. Step 2: Convert to fraction form
    424,486.50/636,729.74 = 108,943.40/x
  3. Step 3: Cross multiply
    424,486.50x = 636,729.74 × 108,943.40
  4. Step 4: Simplify right side
    424,486.50x = 69,367,502,756.72
  5. Step 5: Solve for x
    x = 69,367,502,756.72/424,486.50
  6. Step 6: Final answer
    x = 163,415.10

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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.