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Finding the Fourth Proportional to 687,543.28, 948,866.88 and 381,648.40

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Solution

The fourth proportional to 687,543.28, 948,866.88 and 381,648.40 is: 526,706.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,543.28 : 948,866.88 = 381,648.40 : x
  2. Step 2: Convert to fraction form
    687,543.28/948,866.88 = 381,648.40/x
  3. Step 3: Cross multiply
    687,543.28x = 948,866.88 × 381,648.40
  4. Step 4: Simplify right side
    687,543.28x = 362,133,526,564.99
  5. Step 5: Solve for x
    x = 362,133,526,564.99/687,543.28
  6. Step 6: Final answer
    x = 526,706.52

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