Home / 642,640.95-886,844.60-356,179.53

Finding the Fourth Proportional to 642,640.95, 886,844.60 and 356,179.53

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Solution

The fourth proportional to 642,640.95, 886,844.60 and 356,179.53 is: 491,527.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,640.95 : 886,844.60 = 356,179.53 : x
  2. Step 2: Convert to fraction form
    642,640.95/886,844.60 = 356,179.53/x
  3. Step 3: Cross multiply
    642,640.95x = 886,844.60 × 356,179.53
  4. Step 4: Simplify right side
    642,640.95x = 315,875,891,030.14
  5. Step 5: Solve for x
    x = 315,875,891,030.14/642,640.95
  6. Step 6: Final answer
    x = 491,527.80

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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.