Home / 438,436.10-658,638.30-421,705.55

Finding the Fourth Proportional to 438,436.10, 658,638.30 and 421,705.55

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Solution

The fourth proportional to 438,436.10, 658,638.30 and 421,705.55 is: 633,504.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,436.10 : 658,638.30 = 421,705.55 : x
  2. Step 2: Convert to fraction form
    438,436.10/658,638.30 = 421,705.55/x
  3. Step 3: Cross multiply
    438,436.10x = 658,638.30 × 421,705.55
  4. Step 4: Simplify right side
    438,436.10x = 277,751,426,552.57
  5. Step 5: Solve for x
    x = 277,751,426,552.57/438,436.10
  6. Step 6: Final answer
    x = 633,504.92

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1.5x scale

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.