Home / 990,553.85-1,485,223.53-421,610.96

Finding the Fourth Proportional to 990,553.85, 1,485,223.53 and 421,610.96

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Solution

The fourth proportional to 990,553.85, 1,485,223.53 and 421,610.96 is: 632,157.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,553.85 : 1,485,223.53 = 421,610.96 : x
  2. Step 2: Convert to fraction form
    990,553.85/1,485,223.53 = 421,610.96/x
  3. Step 3: Cross multiply
    990,553.85x = 1,485,223.53 × 421,610.96
  4. Step 4: Simplify right side
    990,553.85x = 626,186,522,801.47
  5. Step 5: Solve for x
    x = 626,186,522,801.47/990,553.85
  6. Step 6: Final answer
    x = 632,157.98

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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.