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Finding the Fourth Proportional to 459,399.78, 689,099.67 and 143,881.38

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Solution

The fourth proportional to 459,399.78, 689,099.67 and 143,881.38 is: 215,822.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,399.78 : 689,099.67 = 143,881.38 : x
  2. Step 2: Convert to fraction form
    459,399.78/689,099.67 = 143,881.38/x
  3. Step 3: Cross multiply
    459,399.78x = 689,099.67 × 143,881.38
  4. Step 4: Simplify right side
    459,399.78x = 99,148,611,477.14
  5. Step 5: Solve for x
    x = 99,148,611,477.14/459,399.78
  6. Step 6: Final answer
    x = 215,822.07

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Similar ratio
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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.