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Finding the Fourth Proportional to 515,521.60, 711,418.27 and 286,113.44

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Solution

The fourth proportional to 515,521.60, 711,418.27 and 286,113.44 is: 394,835.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,521.60 : 711,418.27 = 286,113.44 : x
  2. Step 2: Convert to fraction form
    515,521.60/711,418.27 = 286,113.44/x
  3. Step 3: Cross multiply
    515,521.60x = 711,418.27 × 286,113.44
  4. Step 4: Simplify right side
    515,521.60x = 203,546,328,508.55
  5. Step 5: Solve for x
    x = 203,546,328,508.55/515,521.60
  6. Step 6: Final answer
    x = 394,835.69

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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.