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Finding the Fourth Proportional to 1,260.77, 1,889.86 and 913.24

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Solution

The fourth proportional to 1,260.77, 1,889.86 and 913.24 is: 1,368.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.77 : 1,889.86 = 913.24 : x
  2. Step 2: Convert to fraction form
    1,260.77/1,889.86 = 913.24/x
  3. Step 3: Cross multiply
    1,260.77x = 1,889.86 × 913.24
  4. Step 4: Simplify right side
    1,260.77x = 1,725,895.75
  5. Step 5: Solve for x
    x = 1,725,895.75/1,260.77
  6. Step 6: Final answer
    x = 1,368.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.