Home / 1,431.05-2,145.18-609.53

Finding the Fourth Proportional to 1,431.05, 2,145.18 and 609.53

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Solution

The fourth proportional to 1,431.05, 2,145.18 and 609.53 is: 913.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.05 : 2,145.18 = 609.53 : x
  2. Step 2: Convert to fraction form
    1,431.05/2,145.18 = 609.53/x
  3. Step 3: Cross multiply
    1,431.05x = 2,145.18 × 609.53
  4. Step 4: Simplify right side
    1,431.05x = 1,307,551.57
  5. Step 5: Solve for x
    x = 1,307,551.57/1,431.05
  6. Step 6: Final answer
    x = 913.70

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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.