Home / 812,485.34-1,218,005.29-385,757.90

Finding the Fourth Proportional to 812,485.34, 1,218,005.29 and 385,757.90

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Solution

The fourth proportional to 812,485.34, 1,218,005.29 and 385,757.90 is: 578,293.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,485.34 : 1,218,005.29 = 385,757.90 : x
  2. Step 2: Convert to fraction form
    812,485.34/1,218,005.29 = 385,757.90/x
  3. Step 3: Cross multiply
    812,485.34x = 1,218,005.29 × 385,757.90
  4. Step 4: Simplify right side
    812,485.34x = 469,855,166,386.50
  5. Step 5: Solve for x
    x = 469,855,166,386.50/812,485.34
  6. Step 6: Final answer
    x = 578,293.71

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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.