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Finding the Fourth Proportional to 668,970.96, 922,941.60 and 396,830.40

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Solution

The fourth proportional to 668,970.96, 922,941.60 and 396,830.40 is: 547,484.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,970.96 : 922,941.60 = 396,830.40 : x
  2. Step 2: Convert to fraction form
    668,970.96/922,941.60 = 396,830.40/x
  3. Step 3: Cross multiply
    668,970.96x = 922,941.60 × 396,830.40
  4. Step 4: Simplify right side
    668,970.96x = 366,251,284,304.64
  5. Step 5: Solve for x
    x = 366,251,284,304.64/668,970.96
  6. Step 6: Final answer
    x = 547,484.58

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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.