Home / 1,404.15-2,106.62-430.39

Finding the Fourth Proportional to 1,404.15, 2,106.62 and 430.39

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Solution

The fourth proportional to 1,404.15, 2,106.62 and 430.39 is: 645.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,404.15 : 2,106.62 = 430.39 : x
  2. Step 2: Convert to fraction form
    1,404.15/2,106.62 = 430.39/x
  3. Step 3: Cross multiply
    1,404.15x = 2,106.62 × 430.39
  4. Step 4: Simplify right side
    1,404.15x = 906,672.70
  5. Step 5: Solve for x
    x = 906,672.70/1,404.15
  6. Step 6: Final answer
    x = 645.71

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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.