Home / 830,081.20-1,245,121.80-680,490.40

Finding the Fourth Proportional to 830,081.20, 1,245,121.80 and 680,490.40

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Solution

The fourth proportional to 830,081.20, 1,245,121.80 and 680,490.40 is: 1,020,735.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,081.20 : 1,245,121.80 = 680,490.40 : x
  2. Step 2: Convert to fraction form
    830,081.20/1,245,121.80 = 680,490.40/x
  3. Step 3: Cross multiply
    830,081.20x = 1,245,121.80 × 680,490.40
  4. Step 4: Simplify right side
    830,081.20x = 847,293,431,730.72
  5. Step 5: Solve for x
    x = 847,293,431,730.72/830,081.20
  6. Step 6: Final answer
    x = 1,020,735.60

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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.