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Finding the Fourth Proportional to 515,211.48, 710,992.08 and 285,760.80

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Solution

The fourth proportional to 515,211.48, 710,992.08 and 285,760.80 is: 394,350.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,211.48 : 710,992.08 = 285,760.80 : x
  2. Step 2: Convert to fraction form
    515,211.48/710,992.08 = 285,760.80/x
  3. Step 3: Cross multiply
    515,211.48x = 710,992.08 × 285,760.80
  4. Step 4: Simplify right side
    515,211.48x = 203,173,665,574.46
  5. Step 5: Solve for x
    x = 203,173,665,574.46/515,211.48
  6. Step 6: Final answer
    x = 394,350.04

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1.5x scale

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.