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Finding the Fourth Proportional to 668,708.30, 922,638.92 and 396,549.92

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Solution

The fourth proportional to 668,708.30, 922,638.92 and 396,549.92 is: 547,133.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,708.30 : 922,638.92 = 396,549.92 : x
  2. Step 2: Convert to fraction form
    668,708.30/922,638.92 = 396,549.92/x
  3. Step 3: Cross multiply
    668,708.30x = 922,638.92 × 396,549.92
  4. Step 4: Simplify right side
    668,708.30x = 365,872,389,914.89
  5. Step 5: Solve for x
    x = 365,872,389,914.89/668,708.30
  6. Step 6: Final answer
    x = 547,133.02

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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.