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Finding the Fourth Proportional to 1,065.44, 1,589.60 and 948.50

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Solution

The fourth proportional to 1,065.44, 1,589.60 and 948.50 is: 1,415.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065.44 : 1,589.60 = 948.50 : x
  2. Step 2: Convert to fraction form
    1,065.44/1,589.60 = 948.50/x
  3. Step 3: Cross multiply
    1,065.44x = 1,589.60 × 948.50
  4. Step 4: Simplify right side
    1,065.44x = 1,507,722.91
  5. Step 5: Solve for x
    x = 1,507,722.91/1,065.44
  6. Step 6: Final answer
    x = 1,415.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.