Home / 812,315.87-1,217,750.48-385,588.43

Finding the Fourth Proportional to 812,315.87, 1,217,750.48 and 385,588.43

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Solution

The fourth proportional to 812,315.87, 1,217,750.48 and 385,588.43 is: 578,039.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,315.87 : 1,217,750.48 = 385,588.43 : x
  2. Step 2: Convert to fraction form
    812,315.87/1,217,750.48 = 385,588.43/x
  3. Step 3: Cross multiply
    812,315.87x = 1,217,750.48 × 385,588.43
  4. Step 4: Simplify right side
    812,315.87x = 469,550,493,787.00
  5. Step 5: Solve for x
    x = 469,550,493,787.00/812,315.87
  6. Step 6: Final answer
    x = 578,039.30

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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.