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Finding the Fourth Proportional to 459,015.60, 688,620.60 and 139,141.20

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Solution

The fourth proportional to 459,015.60, 688,620.60 and 139,141.20 is: 208,741.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,015.60 : 688,620.60 = 139,141.20 : x
  2. Step 2: Convert to fraction form
    459,015.60/688,620.60 = 139,141.20/x
  3. Step 3: Cross multiply
    459,015.60x = 688,620.60 × 139,141.20
  4. Step 4: Simplify right side
    459,015.60x = 95,815,496,628.72
  5. Step 5: Solve for x
    x = 95,815,496,628.72/459,015.60
  6. Step 6: Final answer
    x = 208,741.26

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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.