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Finding the Fourth Proportional to 515,015.79, 772,376.06 and 155,221.49

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Solution

The fourth proportional to 515,015.79, 772,376.06 and 155,221.49 is: 232,787.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,015.79 : 772,376.06 = 155,221.49 : x
  2. Step 2: Convert to fraction form
    515,015.79/772,376.06 = 155,221.49/x
  3. Step 3: Cross multiply
    515,015.79x = 772,376.06 × 155,221.49
  4. Step 4: Simplify right side
    515,015.79x = 119,889,358,235.54
  5. Step 5: Solve for x
    x = 119,889,358,235.54/515,015.79
  6. Step 6: Final answer
    x = 232,787.73

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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.