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Finding the Fourth Proportional to 491,477.49, 678,053.70 and 287,463.33

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Solution

The fourth proportional to 491,477.49, 678,053.70 and 287,463.33 is: 396,591.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,477.49 : 678,053.70 = 287,463.33 : x
  2. Step 2: Convert to fraction form
    491,477.49/678,053.70 = 287,463.33/x
  3. Step 3: Cross multiply
    491,477.49x = 678,053.70 × 287,463.33
  4. Step 4: Simplify right side
    491,477.49x = 194,915,574,520.82
  5. Step 5: Solve for x
    x = 194,915,574,520.82/491,477.49
  6. Step 6: Final answer
    x = 396,591.05

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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.