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Finding the Fourth Proportional to 620,764.20, 931,016.70 and 265,789.80

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Solution

The fourth proportional to 620,764.20, 931,016.70 and 265,789.80 is: 398,629.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,764.20 : 931,016.70 = 265,789.80 : x
  2. Step 2: Convert to fraction form
    620,764.20/931,016.70 = 265,789.80/x
  3. Step 3: Cross multiply
    620,764.20x = 931,016.70 × 265,789.80
  4. Step 4: Simplify right side
    620,764.20x = 247,454,742,489.66
  5. Step 5: Solve for x
    x = 247,454,742,489.66/620,764.20
  6. Step 6: Final answer
    x = 398,629.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.