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Finding the Fourth Proportional to 515,100.35, 710,840.52 and 285,678.95

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Solution

The fourth proportional to 515,100.35, 710,840.52 and 285,678.95 is: 394,238.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,100.35 : 710,840.52 = 285,678.95 : x
  2. Step 2: Convert to fraction form
    515,100.35/710,840.52 = 285,678.95/x
  3. Step 3: Cross multiply
    515,100.35x = 710,840.52 × 285,678.95
  4. Step 4: Simplify right side
    515,100.35x = 203,072,170,879.76
  5. Step 5: Solve for x
    x = 203,072,170,879.76/515,100.35
  6. Step 6: Final answer
    x = 394,238.08

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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.