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Finding the Fourth Proportional to 578,118.72, 866,962.80 and 198,933.60

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Solution

The fourth proportional to 578,118.72, 866,962.80 and 198,933.60 is: 298,326.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,118.72 : 866,962.80 = 198,933.60 : x
  2. Step 2: Convert to fraction form
    578,118.72/866,962.80 = 198,933.60/x
  3. Step 3: Cross multiply
    578,118.72x = 866,962.80 × 198,933.60
  4. Step 4: Simplify right side
    578,118.72x = 172,468,030,870.08
  5. Step 5: Solve for x
    x = 172,468,030,870.08/578,118.72
  6. Step 6: Final answer
    x = 298,326.32

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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.