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Finding the Fourth Proportional to 684,884.77, 945,058.17 and 394,591.30

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Solution

The fourth proportional to 684,884.77, 945,058.17 and 394,591.30 is: 544,488.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,884.77 : 945,058.17 = 394,591.30 : x
  2. Step 2: Convert to fraction form
    684,884.77/945,058.17 = 394,591.30/x
  3. Step 3: Cross multiply
    684,884.77x = 945,058.17 × 394,591.30
  4. Step 4: Simplify right side
    684,884.77x = 372,911,731,875.92
  5. Step 5: Solve for x
    x = 372,911,731,875.92/684,884.77
  6. Step 6: Final answer
    x = 544,488.28

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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.