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Finding the Fourth Proportional to 873,453.60, 1,310,165.76 and 393,414.40

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Solution

The fourth proportional to 873,453.60, 1,310,165.76 and 393,414.40 is: 590,115.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,453.60 : 1,310,165.76 = 393,414.40 : x
  2. Step 2: Convert to fraction form
    873,453.60/1,310,165.76 = 393,414.40/x
  3. Step 3: Cross multiply
    873,453.60x = 1,310,165.76 × 393,414.40
  4. Step 4: Simplify right side
    873,453.60x = 515,438,076,370.94
  5. Step 5: Solve for x
    x = 515,438,076,370.94/873,453.60
  6. Step 6: Final answer
    x = 590,115.01

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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.