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Finding the Fourth Proportional to 668,466.88, 922,485.78 and 381,986.28

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Solution

The fourth proportional to 668,466.88, 922,485.78 and 381,986.28 is: 527,141.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,466.88 : 922,485.78 = 381,986.28 : x
  2. Step 2: Convert to fraction form
    668,466.88/922,485.78 = 381,986.28/x
  3. Step 3: Cross multiply
    668,466.88x = 922,485.78 × 381,986.28
  4. Step 4: Simplify right side
    668,466.88x = 352,376,911,455.10
  5. Step 5: Solve for x
    x = 352,376,911,455.10/668,466.88
  6. Step 6: Final answer
    x = 527,141.92

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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.