Home / 727,380.76-1,003,907.60-421,648.39

Finding the Fourth Proportional to 727,380.76, 1,003,907.60 and 421,648.39

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Solution

The fourth proportional to 727,380.76, 1,003,907.60 and 421,648.39 is: 581,945.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    727,380.76 : 1,003,907.60 = 421,648.39 : x
  2. Step 2: Convert to fraction form
    727,380.76/1,003,907.60 = 421,648.39/x
  3. Step 3: Cross multiply
    727,380.76x = 1,003,907.60 × 421,648.39
  4. Step 4: Simplify right side
    727,380.76x = 423,296,017,143.72
  5. Step 5: Solve for x
    x = 423,296,017,143.72/727,380.76
  6. Step 6: Final answer
    x = 581,945.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.