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Finding the Fourth Proportional to 1,705.24, 2,353.20 and 959.20

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Solution

The fourth proportional to 1,705.24, 2,353.20 and 959.20 is: 1,323.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,705.24 : 2,353.20 = 959.20 : x
  2. Step 2: Convert to fraction form
    1,705.24/2,353.20 = 959.20/x
  3. Step 3: Cross multiply
    1,705.24x = 2,353.20 × 959.20
  4. Step 4: Simplify right side
    1,705.24x = 2,257,182.29
  5. Step 5: Solve for x
    x = 2,257,182.29/1,705.24
  6. Step 6: Final answer
    x = 1,323.68

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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.