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Finding the Fourth Proportional to 1,742.90, 2,405.40 and 957.02

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Solution

The fourth proportional to 1,742.90, 2,405.40 and 957.02 is: 1,320.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,742.90 : 2,405.40 = 957.02 : x
  2. Step 2: Convert to fraction form
    1,742.90/2,405.40 = 957.02/x
  3. Step 3: Cross multiply
    1,742.90x = 2,405.40 × 957.02
  4. Step 4: Simplify right side
    1,742.90x = 2,302,015.91
  5. Step 5: Solve for x
    x = 2,302,015.91/1,742.90
  6. Step 6: Final answer
    x = 1,320.80

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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.