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Finding the Fourth Proportional to 687,551, 948,802.20 and 381,626.56

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Solution

The fourth proportional to 687,551, 948,802.20 and 381,626.56 is: 526,634.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,551 : 948,802.20 = 381,626.56 : x
  2. Step 2: Convert to fraction form
    687,551/948,802.20 = 381,626.56/x
  3. Step 3: Cross multiply
    687,551x = 948,802.20 × 381,626.56
  4. Step 4: Simplify right side
    687,551x = 362,088,119,706.43
  5. Step 5: Solve for x
    x = 362,088,119,706.43/687,551
  6. Step 6: Final answer
    x = 526,634.56

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1.5x scale

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.