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Finding the Fourth Proportional to 624,713.20, 861,752.28 and 395,199.28

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Solution

The fourth proportional to 624,713.20, 861,752.28 and 395,199.28 is: 545,152.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,713.20 : 861,752.28 = 395,199.28 : x
  2. Step 2: Convert to fraction form
    624,713.20/861,752.28 = 395,199.28/x
  3. Step 3: Cross multiply
    624,713.20x = 861,752.28 × 395,199.28
  4. Step 4: Simplify right side
    624,713.20x = 340,563,880,594.36
  5. Step 5: Solve for x
    x = 340,563,880,594.36/624,713.20
  6. Step 6: Final answer
    x = 545,152.37

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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.