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Finding the Fourth Proportional to 678,340.76, 936,063.42 and 376,511

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Solution

The fourth proportional to 678,340.76, 936,063.42 and 376,511 is: 519,559.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,340.76 : 936,063.42 = 376,511 : x
  2. Step 2: Convert to fraction form
    678,340.76/936,063.42 = 376,511/x
  3. Step 3: Cross multiply
    678,340.76x = 936,063.42 × 376,511
  4. Step 4: Simplify right side
    678,340.76x = 352,438,174,327.62
  5. Step 5: Solve for x
    x = 352,438,174,327.62/678,340.76
  6. Step 6: Final answer
    x = 519,559.19

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1.5x scale

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.