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Finding the Fourth Proportional to 266,420.40, 399,679.20 and 108,664.80

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Solution

The fourth proportional to 266,420.40, 399,679.20 and 108,664.80 is: 163,017.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,420.40 : 399,679.20 = 108,664.80 : x
  2. Step 2: Convert to fraction form
    266,420.40/399,679.20 = 108,664.80/x
  3. Step 3: Cross multiply
    266,420.40x = 399,679.20 × 108,664.80
  4. Step 4: Simplify right side
    266,420.40x = 43,431,060,332.16
  5. Step 5: Solve for x
    x = 43,431,060,332.16/266,420.40
  6. Step 6: Final answer
    x = 163,017.02

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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.