Home / 421,821.30-631,747.80-413,364.90

Finding the Fourth Proportional to 421,821.30, 631,747.80 and 413,364.90

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Solution

The fourth proportional to 421,821.30, 631,747.80 and 413,364.90 is: 619,082.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,821.30 : 631,747.80 = 413,364.90 : x
  2. Step 2: Convert to fraction form
    421,821.30/631,747.80 = 413,364.90/x
  3. Step 3: Cross multiply
    421,821.30x = 631,747.80 × 413,364.90
  4. Step 4: Simplify right side
    421,821.30x = 261,142,366,172.22
  5. Step 5: Solve for x
    x = 261,142,366,172.22/421,821.30
  6. Step 6: Final answer
    x = 619,082.93

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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.