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Finding the Fourth Proportional to 385,632.66, 578,313.48 and 115,680.30

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Solution

The fourth proportional to 385,632.66, 578,313.48 and 115,680.30 is: 173,479.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,632.66 : 578,313.48 = 115,680.30 : x
  2. Step 2: Convert to fraction form
    385,632.66/578,313.48 = 115,680.30/x
  3. Step 3: Cross multiply
    385,632.66x = 578,313.48 × 115,680.30
  4. Step 4: Simplify right side
    385,632.66x = 66,899,476,860.44
  5. Step 5: Solve for x
    x = 66,899,476,860.44/385,632.66
  6. Step 6: Final answer
    x = 173,479.80

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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.