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Finding the Fourth Proportional to 480,489.79, 721,169.43 and 256,039.87

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Solution

The fourth proportional to 480,489.79, 721,169.43 and 256,039.87 is: 384,291.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,489.79 : 721,169.43 = 256,039.87 : x
  2. Step 2: Convert to fraction form
    480,489.79/721,169.43 = 256,039.87/x
  3. Step 3: Cross multiply
    480,489.79x = 721,169.43 × 256,039.87
  4. Step 4: Simplify right side
    480,489.79x = 184,648,127,105.17
  5. Step 5: Solve for x
    x = 184,648,127,105.17/480,489.79
  6. Step 6: Final answer
    x = 384,291.47

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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.