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Finding the Fourth Proportional to 515,012.88, 772,371.70 and 155,218.58

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Solution

The fourth proportional to 515,012.88, 772,371.70 and 155,218.58 is: 232,783.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,012.88 : 772,371.70 = 155,218.58 : x
  2. Step 2: Convert to fraction form
    515,012.88/772,371.70 = 155,218.58/x
  3. Step 3: Cross multiply
    515,012.88x = 772,371.70 × 155,218.58
  4. Step 4: Simplify right side
    515,012.88x = 119,886,438,025.78
  5. Step 5: Solve for x
    x = 119,886,438,025.78/515,012.88
  6. Step 6: Final answer
    x = 232,783.38

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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.