Home / 305,971.38-459,136.86-128,464.74

Finding the Fourth Proportional to 305,971.38, 459,136.86 and 128,464.74

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Solution

The fourth proportional to 305,971.38, 459,136.86 and 128,464.74 is: 192,772.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,971.38 : 459,136.86 = 128,464.74 : x
  2. Step 2: Convert to fraction form
    305,971.38/459,136.86 = 128,464.74/x
  3. Step 3: Cross multiply
    305,971.38x = 459,136.86 × 128,464.74
  4. Step 4: Simplify right side
    305,971.38x = 58,982,897,344.32
  5. Step 5: Solve for x
    x = 58,982,897,344.32/305,971.38
  6. Step 6: Final answer
    x = 192,772.60

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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.