Home / 680,724.40-1,019,531.40-400,788.40

Finding the Fourth Proportional to 680,724.40, 1,019,531.40 and 400,788.40

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Solution

The fourth proportional to 680,724.40, 1,019,531.40 and 400,788.40 is: 600,266.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,724.40 : 1,019,531.40 = 400,788.40 : x
  2. Step 2: Convert to fraction form
    680,724.40/1,019,531.40 = 400,788.40/x
  3. Step 3: Cross multiply
    680,724.40x = 1,019,531.40 × 400,788.40
  4. Step 4: Simplify right side
    680,724.40x = 408,616,358,555.76
  5. Step 5: Solve for x
    x = 408,616,358,555.76/680,724.40
  6. Step 6: Final answer
    x = 600,266.95

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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.