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Finding the Fourth Proportional to 515,388.68, 711,026.40 and 345,677.48

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Solution

The fourth proportional to 515,388.68, 711,026.40 and 345,677.48 is: 476,894.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,388.68 : 711,026.40 = 345,677.48 : x
  2. Step 2: Convert to fraction form
    515,388.68/711,026.40 = 345,677.48/x
  3. Step 3: Cross multiply
    515,388.68x = 711,026.40 × 345,677.48
  4. Step 4: Simplify right side
    515,388.68x = 245,785,814,165.47
  5. Step 5: Solve for x
    x = 245,785,814,165.47/515,388.68
  6. Step 6: Final answer
    x = 476,894.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.