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Finding the Fourth Proportional to 1,576.70, 2,176.08 and 913.58

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Solution

The fourth proportional to 1,576.70, 2,176.08 and 913.58 is: 1,260.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,576.70 : 2,176.08 = 913.58 : x
  2. Step 2: Convert to fraction form
    1,576.70/2,176.08 = 913.58/x
  3. Step 3: Cross multiply
    1,576.70x = 2,176.08 × 913.58
  4. Step 4: Simplify right side
    1,576.70x = 1,988,023.17
  5. Step 5: Solve for x
    x = 1,988,023.17/1,576.70
  6. Step 6: Final answer
    x = 1,260.88

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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.