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Finding the Fourth Proportional to 266,528.40, 399,646.80 and 108,578.40

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Solution

The fourth proportional to 266,528.40, 399,646.80 and 108,578.40 is: 162,808.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,528.40 : 399,646.80 = 108,578.40 : x
  2. Step 2: Convert to fraction form
    266,528.40/399,646.80 = 108,578.40/x
  3. Step 3: Cross multiply
    266,528.40x = 399,646.80 × 108,578.40
  4. Step 4: Simplify right side
    266,528.40x = 43,393,010,109.12
  5. Step 5: Solve for x
    x = 43,393,010,109.12/266,528.40
  6. Step 6: Final answer
    x = 162,808.20

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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.