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Finding the Fourth Proportional to 668,332.64, 922,213.78 and 381,871.28

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Solution

The fourth proportional to 668,332.64, 922,213.78 and 381,871.28 is: 526,933.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,332.64 : 922,213.78 = 381,871.28 : x
  2. Step 2: Convert to fraction form
    668,332.64/922,213.78 = 381,871.28/x
  3. Step 3: Cross multiply
    668,332.64x = 922,213.78 × 381,871.28
  4. Step 4: Simplify right side
    668,332.64x = 352,166,956,602.24
  5. Step 5: Solve for x
    x = 352,166,956,602.24/668,332.64
  6. Step 6: Final answer
    x = 526,933.65

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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.