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Finding the Fourth Proportional to 1,430.72, 2,145.14 and 608.77

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Solution

The fourth proportional to 1,430.72, 2,145.14 and 608.77 is: 912.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.72 : 2,145.14 = 608.77 : x
  2. Step 2: Convert to fraction form
    1,430.72/2,145.14 = 608.77/x
  3. Step 3: Cross multiply
    1,430.72x = 2,145.14 × 608.77
  4. Step 4: Simplify right side
    1,430.72x = 1,305,896.88
  5. Step 5: Solve for x
    x = 1,305,896.88/1,430.72
  6. Step 6: Final answer
    x = 912.76

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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.