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Finding the Fourth Proportional to 1,709.64, 2,564.36 and 477.12

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Solution

The fourth proportional to 1,709.64, 2,564.36 and 477.12 is: 715.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,709.64 : 2,564.36 = 477.12 : x
  2. Step 2: Convert to fraction form
    1,709.64/2,564.36 = 477.12/x
  3. Step 3: Cross multiply
    1,709.64x = 2,564.36 × 477.12
  4. Step 4: Simplify right side
    1,709.64x = 1,223,507.44
  5. Step 5: Solve for x
    x = 1,223,507.44/1,709.64
  6. Step 6: Final answer
    x = 715.65

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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.