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Finding the Fourth Proportional to 1,760.70, 2,429.93 and 974.90

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Solution

The fourth proportional to 1,760.70, 2,429.93 and 974.90 is: 1,345.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,760.70 : 2,429.93 = 974.90 : x
  2. Step 2: Convert to fraction form
    1,760.70/2,429.93 = 974.90/x
  3. Step 3: Cross multiply
    1,760.70x = 2,429.93 × 974.90
  4. Step 4: Simplify right side
    1,760.70x = 2,368,938.76
  5. Step 5: Solve for x
    x = 2,368,938.76/1,760.70
  6. Step 6: Final answer
    x = 1,345.45

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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.