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Finding the Fourth Proportional to 1,742.85, 2,405.05 and 956.88

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Solution

The fourth proportional to 1,742.85, 2,405.05 and 956.88 is: 1,320.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,742.85 : 2,405.05 = 956.88 : x
  2. Step 2: Convert to fraction form
    1,742.85/2,405.05 = 956.88/x
  3. Step 3: Cross multiply
    1,742.85x = 2,405.05 × 956.88
  4. Step 4: Simplify right side
    1,742.85x = 2,301,344.24
  5. Step 5: Solve for x
    x = 2,301,344.24/1,742.85
  6. Step 6: Final answer
    x = 1,320.45

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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.