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Finding the Fourth Proportional to 424,647.36, 636,975.90 and 144,186.48

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Solution

The fourth proportional to 424,647.36, 636,975.90 and 144,186.48 is: 216,281.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,647.36 : 636,975.90 = 144,186.48 : x
  2. Step 2: Convert to fraction form
    424,647.36/636,975.90 = 144,186.48/x
  3. Step 3: Cross multiply
    424,647.36x = 636,975.90 × 144,186.48
  4. Step 4: Simplify right side
    424,647.36x = 91,843,312,865.83
  5. Step 5: Solve for x
    x = 91,843,312,865.83/424,647.36
  6. Step 6: Final answer
    x = 216,281.37

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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.