Home / 990,042.44-1,485,688.38-421,422.63

Finding the Fourth Proportional to 990,042.44, 1,485,688.38 and 421,422.63

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Solution

The fourth proportional to 990,042.44, 1,485,688.38 and 421,422.63 is: 632,399.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,042.44 : 1,485,688.38 = 421,422.63 : x
  2. Step 2: Convert to fraction form
    990,042.44/1,485,688.38 = 421,422.63/x
  3. Step 3: Cross multiply
    990,042.44x = 1,485,688.38 × 421,422.63
  4. Step 4: Simplify right side
    990,042.44x = 626,102,702,352.93
  5. Step 5: Solve for x
    x = 626,102,702,352.93/990,042.44
  6. Step 6: Final answer
    x = 632,399.86

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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.