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Finding the Fourth Proportional to 385,561.23, 578,480.22 and 172,311.45

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Solution

The fourth proportional to 385,561.23, 578,480.22 and 172,311.45 is: 258,529.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,561.23 : 578,480.22 = 172,311.45 : x
  2. Step 2: Convert to fraction form
    385,561.23/578,480.22 = 172,311.45/x
  3. Step 3: Cross multiply
    385,561.23x = 578,480.22 × 172,311.45
  4. Step 4: Simplify right side
    385,561.23x = 99,678,765,504.52
  5. Step 5: Solve for x
    x = 99,678,765,504.52/385,561.23
  6. Step 6: Final answer
    x = 258,529.02

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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.