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Finding the Fourth Proportional to 615,586.60, 921,279.30 and 515,859.40

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Solution

The fourth proportional to 615,586.60, 921,279.30 and 515,859.40 is: 772,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,586.60 : 921,279.30 = 515,859.40 : x
  2. Step 2: Convert to fraction form
    615,586.60/921,279.30 = 515,859.40/x
  3. Step 3: Cross multiply
    615,586.60x = 921,279.30 × 515,859.40
  4. Step 4: Simplify right side
    615,586.60x = 475,250,586,930.42
  5. Step 5: Solve for x
    x = 475,250,586,930.42/615,586.60
  6. Step 6: Final answer
    x = 772,028.80

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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.