Home / 639,298.95-882,520.26-421,636.75

Finding the Fourth Proportional to 639,298.95, 882,520.26 and 421,636.75

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Solution

The fourth proportional to 639,298.95, 882,520.26 and 421,636.75 is: 582,048.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,298.95 : 882,520.26 = 421,636.75 : x
  2. Step 2: Convert to fraction form
    639,298.95/882,520.26 = 421,636.75/x
  3. Step 3: Cross multiply
    639,298.95x = 882,520.26 × 421,636.75
  4. Step 4: Simplify right side
    639,298.95x = 372,102,974,235.56
  5. Step 5: Solve for x
    x = 372,102,974,235.56/639,298.95
  6. Step 6: Final answer
    x = 582,048.47

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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.