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Finding the Fourth Proportional to 687,494.70, 948,739.38 and 381,574.74

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Solution

The fourth proportional to 687,494.70, 948,739.38 and 381,574.74 is: 526,571.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,494.70 : 948,739.38 = 381,574.74 : x
  2. Step 2: Convert to fraction form
    687,494.70/948,739.38 = 381,574.74/x
  3. Step 3: Cross multiply
    687,494.70x = 948,739.38 × 381,574.74
  4. Step 4: Simplify right side
    687,494.70x = 362,014,982,251.26
  5. Step 5: Solve for x
    x = 362,014,982,251.26/687,494.70
  6. Step 6: Final answer
    x = 526,571.31

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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.