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Finding the Fourth Proportional to 678,715.66, 936,635.31 and 372,799.21

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Solution

The fourth proportional to 678,715.66, 936,635.31 and 372,799.21 is: 514,467.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,715.66 : 936,635.31 = 372,799.21 : x
  2. Step 2: Convert to fraction form
    678,715.66/936,635.31 = 372,799.21/x
  3. Step 3: Cross multiply
    678,715.66x = 936,635.31 × 372,799.21
  4. Step 4: Simplify right side
    678,715.66x = 349,176,903,626.11
  5. Step 5: Solve for x
    x = 349,176,903,626.11/678,715.66
  6. Step 6: Final answer
    x = 514,467.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.