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Finding the Fourth Proportional to 266,721.60, 399,544.80 and 166,574.40

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Solution

The fourth proportional to 266,721.60, 399,544.80 and 166,574.40 is: 249,525.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,721.60 : 399,544.80 = 166,574.40 : x
  2. Step 2: Convert to fraction form
    266,721.60/399,544.80 = 166,574.40/x
  3. Step 3: Cross multiply
    266,721.60x = 399,544.80 × 166,574.40
  4. Step 4: Simplify right side
    266,721.60x = 66,553,935,333.12
  5. Step 5: Solve for x
    x = 66,553,935,333.12/266,721.60
  6. Step 6: Final answer
    x = 249,525.86

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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.