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Finding the Fourth Proportional to 811,846.48, 1,217,744.52 and 385,689

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Solution

The fourth proportional to 811,846.48, 1,217,744.52 and 385,689 is: 578,521.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,846.48 : 1,217,744.52 = 385,689 : x
  2. Step 2: Convert to fraction form
    811,846.48/1,217,744.52 = 385,689/x
  3. Step 3: Cross multiply
    811,846.48x = 1,217,744.52 × 385,689
  4. Step 4: Simplify right side
    811,846.48x = 469,670,666,174.28
  5. Step 5: Solve for x
    x = 469,670,666,174.28/811,846.48
  6. Step 6: Final answer
    x = 578,521.53

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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.