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Finding the Fourth Proportional to 668,630.64, 922,485.78 and 381,947.70

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Solution

The fourth proportional to 668,630.64, 922,485.78 and 381,947.70 is: 526,959.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,630.64 : 922,485.78 = 381,947.70 : x
  2. Step 2: Convert to fraction form
    668,630.64/922,485.78 = 381,947.70/x
  3. Step 3: Cross multiply
    668,630.64x = 922,485.78 × 381,947.70
  4. Step 4: Simplify right side
    668,630.64x = 352,341,321,953.71
  5. Step 5: Solve for x
    x = 352,341,321,953.71/668,630.64
  6. Step 6: Final answer
    x = 526,959.58

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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.