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Finding the Fourth Proportional to 680,790.80, 939,409.80 and 394,271.12

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Solution

The fourth proportional to 680,790.80, 939,409.80 and 394,271.12 is: 544,046.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,790.80 : 939,409.80 = 394,271.12 : x
  2. Step 2: Convert to fraction form
    680,790.80/939,409.80 = 394,271.12/x
  3. Step 3: Cross multiply
    680,790.80x = 939,409.80 × 394,271.12
  4. Step 4: Simplify right side
    680,790.80x = 370,382,153,984.98
  5. Step 5: Solve for x
    x = 370,382,153,984.98/680,790.80
  6. Step 6: Final answer
    x = 544,046.94

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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.