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Finding the Fourth Proportional to 668,331.64, 922,212.40 and 381,870.28

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Solution

The fourth proportional to 668,331.64, 922,212.40 and 381,870.28 is: 526,932.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,331.64 : 922,212.40 = 381,870.28 : x
  2. Step 2: Convert to fraction form
    668,331.64/922,212.40 = 381,870.28/x
  3. Step 3: Cross multiply
    668,331.64x = 922,212.40 × 381,870.28
  4. Step 4: Simplify right side
    668,331.64x = 352,165,507,407.47
  5. Step 5: Solve for x
    x = 352,165,507,407.47/668,331.64
  6. Step 6: Final answer
    x = 526,932.27

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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.