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Finding the Fourth Proportional to 578,643.80, 868,008.90 and 204,618.20

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Solution

The fourth proportional to 578,643.80, 868,008.90 and 204,618.20 is: 306,942.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,643.80 : 868,008.90 = 204,618.20 : x
  2. Step 2: Convert to fraction form
    578,643.80/868,008.90 = 204,618.20/x
  3. Step 3: Cross multiply
    578,643.80x = 868,008.90 × 204,618.20
  4. Step 4: Simplify right side
    578,643.80x = 177,610,418,701.98
  5. Step 5: Solve for x
    x = 177,610,418,701.98/578,643.80
  6. Step 6: Final answer
    x = 306,942.58

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1.5x scale

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.