Home / 438,433.10-658,633.80-421,702.55

Finding the Fourth Proportional to 438,433.10, 658,633.80 and 421,702.55

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Solution

The fourth proportional to 438,433.10, 658,633.80 and 421,702.55 is: 633,500.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,433.10 : 658,633.80 = 421,702.55 : x
  2. Step 2: Convert to fraction form
    438,433.10/658,633.80 = 421,702.55/x
  3. Step 3: Cross multiply
    438,433.10x = 658,633.80 × 421,702.55
  4. Step 4: Simplify right side
    438,433.10x = 277,747,552,976.19
  5. Step 5: Solve for x
    x = 277,747,552,976.19/438,433.10
  6. Step 6: Final answer
    x = 633,500.42

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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.