Home / 385,470.56-578,342.77-172,218.94

Finding the Fourth Proportional to 385,470.56, 578,342.77 and 172,218.94

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Solution

The fourth proportional to 385,470.56, 578,342.77 and 172,218.94 is: 258,389.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,470.56 : 578,342.77 = 172,218.94 : x
  2. Step 2: Convert to fraction form
    385,470.56/578,342.77 = 172,218.94/x
  3. Step 3: Cross multiply
    385,470.56x = 578,342.77 × 172,218.94
  4. Step 4: Simplify right side
    385,470.56x = 99,601,576,929.66
  5. Step 5: Solve for x
    x = 99,601,576,929.66/385,470.56
  6. Step 6: Final answer
    x = 258,389.58

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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.