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Finding the Fourth Proportional to 1,145.41, 1,580.92 and 948.58

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Solution

The fourth proportional to 1,145.41, 1,580.92 and 948.58 is: 1,309.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,145.41 : 1,580.92 = 948.58 : x
  2. Step 2: Convert to fraction form
    1,145.41/1,580.92 = 948.58/x
  3. Step 3: Cross multiply
    1,145.41x = 1,580.92 × 948.58
  4. Step 4: Simplify right side
    1,145.41x = 1,499,622.77
  5. Step 5: Solve for x
    x = 1,499,622.77/1,145.41
  6. Step 6: Final answer
    x = 1,309.25

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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.