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Finding the Fourth Proportional to 266,516.40, 399,628.80 and 108,566.40

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Solution

The fourth proportional to 266,516.40, 399,628.80 and 108,566.40 is: 162,790.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,516.40 : 399,628.80 = 108,566.40 : x
  2. Step 2: Convert to fraction form
    266,516.40/399,628.80 = 108,566.40/x
  3. Step 3: Cross multiply
    266,516.40x = 399,628.80 × 108,566.40
  4. Step 4: Simplify right side
    266,516.40x = 43,386,260,152.32
  5. Step 5: Solve for x
    x = 43,386,260,152.32/266,516.40
  6. Step 6: Final answer
    x = 162,790.21

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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.