Home / 2,291.24-3,436.46-647.40

Finding the Fourth Proportional to 2,291.24, 3,436.46 and 647.40

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Solution

The fourth proportional to 2,291.24, 3,436.46 and 647.40 is: 970.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,291.24 : 3,436.46 = 647.40 : x
  2. Step 2: Convert to fraction form
    2,291.24/3,436.46 = 647.40/x
  3. Step 3: Cross multiply
    2,291.24x = 3,436.46 × 647.40
  4. Step 4: Simplify right side
    2,291.24x = 2,224,760.97
  5. Step 5: Solve for x
    x = 2,224,760.97/2,291.24
  6. Step 6: Final answer
    x = 970.99

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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.