Home / 628,839.60-867,770.06-342,359.07

Finding the Fourth Proportional to 628,839.60, 867,770.06 and 342,359.07

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Solution

The fourth proportional to 628,839.60, 867,770.06 and 342,359.07 is: 472,439.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,839.60 : 867,770.06 = 342,359.07 : x
  2. Step 2: Convert to fraction form
    628,839.60/867,770.06 = 342,359.07/x
  3. Step 3: Cross multiply
    628,839.60x = 867,770.06 × 342,359.07
  4. Step 4: Simplify right side
    628,839.60x = 297,088,949,003.65
  5. Step 5: Solve for x
    x = 297,088,949,003.65/628,839.60
  6. Step 6: Final answer
    x = 472,439.95

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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.