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Finding the Fourth Proportional to 615,570.60, 921,255.30 and 515,843.40

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Solution

The fourth proportional to 615,570.60, 921,255.30 and 515,843.40 is: 772,004.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,570.60 : 921,255.30 = 515,843.40 : x
  2. Step 2: Convert to fraction form
    615,570.60/921,255.30 = 515,843.40/x
  3. Step 3: Cross multiply
    615,570.60x = 921,255.30 × 515,843.40
  4. Step 4: Simplify right side
    615,570.60x = 475,223,466,220.02
  5. Step 5: Solve for x
    x = 475,223,466,220.02/615,570.60
  6. Step 6: Final answer
    x = 772,004.81

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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.