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Finding the Fourth Proportional to 266,005.40, 399,008.10 and 166,278.20

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Solution

The fourth proportional to 266,005.40, 399,008.10 and 166,278.20 is: 249,417.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,005.40 : 399,008.10 = 166,278.20 : x
  2. Step 2: Convert to fraction form
    266,005.40/399,008.10 = 166,278.20/x
  3. Step 3: Cross multiply
    266,005.40x = 399,008.10 × 166,278.20
  4. Step 4: Simplify right side
    266,005.40x = 66,346,348,653.42
  5. Step 5: Solve for x
    x = 66,346,348,653.42/266,005.40
  6. Step 6: Final answer
    x = 249,417.30

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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.