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Finding the Fourth Proportional to 665,136.60, 998,451.21 and 266,055.60

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Solution

The fourth proportional to 665,136.60, 998,451.21 and 266,055.60 is: 399,381.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,136.60 : 998,451.21 = 266,055.60 : x
  2. Step 2: Convert to fraction form
    665,136.60/998,451.21 = 266,055.60/x
  3. Step 3: Cross multiply
    665,136.60x = 998,451.21 × 266,055.60
  4. Step 4: Simplify right side
    665,136.60x = 265,643,535,747.28
  5. Step 5: Solve for x
    x = 265,643,535,747.28/665,136.60
  6. Step 6: Final answer
    x = 399,381.93

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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.