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Finding the Fourth Proportional to 668,587.86, 922,519.65 and 396,604.98

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Solution

The fourth proportional to 668,587.86, 922,519.65 and 396,604.98 is: 547,236.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,587.86 : 922,519.65 = 396,604.98 : x
  2. Step 2: Convert to fraction form
    668,587.86/922,519.65 = 396,604.98/x
  3. Step 3: Cross multiply
    668,587.86x = 922,519.65 × 396,604.98
  4. Step 4: Simplify right side
    668,587.86x = 365,875,887,337.86
  5. Step 5: Solve for x
    x = 365,875,887,337.86/668,587.86
  6. Step 6: Final answer
    x = 547,236.81

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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.