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Finding the Fourth Proportional to 1,134.75, 1,564.77 and 898.32

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Solution

The fourth proportional to 1,134.75, 1,564.77 and 898.32 is: 1,238.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,134.75 : 1,564.77 = 898.32 : x
  2. Step 2: Convert to fraction form
    1,134.75/1,564.77 = 898.32/x
  3. Step 3: Cross multiply
    1,134.75x = 1,564.77 × 898.32
  4. Step 4: Simplify right side
    1,134.75x = 1,405,664.19
  5. Step 5: Solve for x
    x = 1,405,664.19/1,134.75
  6. Step 6: Final answer
    x = 1,238.74

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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.