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Finding the Fourth Proportional to 687,533.45, 948,781.88 and 381,591.89

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Solution

The fourth proportional to 687,533.45, 948,781.88 and 381,591.89 is: 526,588.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,533.45 : 948,781.88 = 381,591.89 : x
  2. Step 2: Convert to fraction form
    687,533.45/948,781.88 = 381,591.89/x
  3. Step 3: Cross multiply
    687,533.45x = 948,781.88 × 381,591.89
  4. Step 4: Simplify right side
    687,533.45x = 362,047,464,135.08
  5. Step 5: Solve for x
    x = 362,047,464,135.08/687,533.45
  6. Step 6: Final answer
    x = 526,588.88

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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.