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Finding the Fourth Proportional to 424,376.70, 636,643.77 and 140,087.06

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Solution

The fourth proportional to 424,376.70, 636,643.77 and 140,087.06 is: 210,156.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,376.70 : 636,643.77 = 140,087.06 : x
  2. Step 2: Convert to fraction form
    424,376.70/636,643.77 = 140,087.06/x
  3. Step 3: Cross multiply
    424,376.70x = 636,643.77 × 140,087.06
  4. Step 4: Simplify right side
    424,376.70x = 89,185,550,122.96
  5. Step 5: Solve for x
    x = 89,185,550,122.96/424,376.70
  6. Step 6: Final answer
    x = 210,156.57

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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.