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Finding the Fourth Proportional to 266,077.60, 399,116.40 and 260,828.80

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Solution

The fourth proportional to 266,077.60, 399,116.40 and 260,828.80 is: 391,243.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,077.60 : 399,116.40 = 260,828.80 : x
  2. Step 2: Convert to fraction form
    266,077.60/399,116.40 = 260,828.80/x
  3. Step 3: Cross multiply
    266,077.60x = 399,116.40 × 260,828.80
  4. Step 4: Simplify right side
    266,077.60x = 104,101,051,672.32
  5. Step 5: Solve for x
    x = 104,101,051,672.32/266,077.60
  6. Step 6: Final answer
    x = 391,243.20

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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.