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Finding the Fourth Proportional to 459,316.70, 688,930.54 and 139,471.39

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Solution

The fourth proportional to 459,316.70, 688,930.54 and 139,471.39 is: 209,193.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,316.70 : 688,930.54 = 139,471.39 : x
  2. Step 2: Convert to fraction form
    459,316.70/688,930.54 = 139,471.39/x
  3. Step 3: Cross multiply
    459,316.70x = 688,930.54 × 139,471.39
  4. Step 4: Simplify right side
    459,316.70x = 96,086,097,956.25
  5. Step 5: Solve for x
    x = 96,086,097,956.25/459,316.70
  6. Step 6: Final answer
    x = 209,193.56

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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.