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Finding the Fourth Proportional to 615,498.60, 921,147.30 and 515,771.40

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Solution

The fourth proportional to 615,498.60, 921,147.30 and 515,771.40 is: 771,896.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,498.60 : 921,147.30 = 515,771.40 : x
  2. Step 2: Convert to fraction form
    615,498.60/921,147.30 = 515,771.40/x
  3. Step 3: Cross multiply
    615,498.60x = 921,147.30 × 515,771.40
  4. Step 4: Simplify right side
    615,498.60x = 475,101,432,527.22
  5. Step 5: Solve for x
    x = 475,101,432,527.22/615,498.60
  6. Step 6: Final answer
    x = 771,896.85

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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.