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Finding the Fourth Proportional to 266,087.60, 399,131.40 and 260,838.80

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Solution

The fourth proportional to 266,087.60, 399,131.40 and 260,838.80 is: 391,258.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,087.60 : 399,131.40 = 260,838.80 : x
  2. Step 2: Convert to fraction form
    266,087.60/399,131.40 = 260,838.80/x
  3. Step 3: Cross multiply
    266,087.60x = 399,131.40 × 260,838.80
  4. Step 4: Simplify right side
    266,087.60x = 104,108,955,418.32
  5. Step 5: Solve for x
    x = 104,108,955,418.32/266,087.60
  6. Step 6: Final answer
    x = 391,258.20

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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.