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Finding the Fourth Proportional to 1,709.70, 2,564.55 and 1,053.60

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Solution

The fourth proportional to 1,709.70, 2,564.55 and 1,053.60 is: 1,580.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,709.70 : 2,564.55 = 1,053.60 : x
  2. Step 2: Convert to fraction form
    1,709.70/2,564.55 = 1,053.60/x
  3. Step 3: Cross multiply
    1,709.70x = 2,564.55 × 1,053.60
  4. Step 4: Simplify right side
    1,709.70x = 2,702,009.88
  5. Step 5: Solve for x
    x = 2,702,009.88/1,709.70
  6. Step 6: Final answer
    x = 1,580.40

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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.