Home / 1,747.50-2,621.27-431.25

Finding the Fourth Proportional to 1,747.50, 2,621.27 and 431.25

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Solution

The fourth proportional to 1,747.50, 2,621.27 and 431.25 is: 646.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,747.50 : 2,621.27 = 431.25 : x
  2. Step 2: Convert to fraction form
    1,747.50/2,621.27 = 431.25/x
  3. Step 3: Cross multiply
    1,747.50x = 2,621.27 × 431.25
  4. Step 4: Simplify right side
    1,747.50x = 1,130,413.94
  5. Step 5: Solve for x
    x = 1,130,413.94/1,747.50
  6. Step 6: Final answer
    x = 646.88

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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.