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Finding the Fourth Proportional to 515,045.87, 772,410.70 and 356,142.80

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Solution

The fourth proportional to 515,045.87, 772,410.70 and 356,142.80 is: 534,104.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,045.87 : 772,410.70 = 356,142.80 : x
  2. Step 2: Convert to fraction form
    515,045.87/772,410.70 = 356,142.80/x
  3. Step 3: Cross multiply
    515,045.87x = 772,410.70 × 356,142.80
  4. Step 4: Simplify right side
    515,045.87x = 275,088,509,447.96
  5. Step 5: Solve for x
    x = 275,088,509,447.96/515,045.87
  6. Step 6: Final answer
    x = 534,104.87

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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.