Home / 813,940.80-1,220,565.60-393,345.60

Finding the Fourth Proportional to 813,940.80, 1,220,565.60 and 393,345.60

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Solution

The fourth proportional to 813,940.80, 1,220,565.60 and 393,345.60 is: 589,851.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,940.80 : 1,220,565.60 = 393,345.60 : x
  2. Step 2: Convert to fraction form
    813,940.80/1,220,565.60 = 393,345.60/x
  3. Step 3: Cross multiply
    813,940.80x = 1,220,565.60 × 393,345.60
  4. Step 4: Simplify right side
    813,940.80x = 480,104,108,271.36
  5. Step 5: Solve for x
    x = 480,104,108,271.36/813,940.80
  6. Step 6: Final answer
    x = 589,851.39

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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.