Home / 1,430.28-2,145.33-608.40

Finding the Fourth Proportional to 1,430.28, 2,145.33 and 608.40

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Solution

The fourth proportional to 1,430.28, 2,145.33 and 608.40 is: 912.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.28 : 2,145.33 = 608.40 : x
  2. Step 2: Convert to fraction form
    1,430.28/2,145.33 = 608.40/x
  3. Step 3: Cross multiply
    1,430.28x = 2,145.33 × 608.40
  4. Step 4: Simplify right side
    1,430.28x = 1,305,218.77
  5. Step 5: Solve for x
    x = 1,305,218.77/1,430.28
  6. Step 6: Final answer
    x = 912.56

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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.