Home / 1,815.90-2,505.51-1,030.38

Finding the Fourth Proportional to 1,815.90, 2,505.51 and 1,030.38

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Solution

The fourth proportional to 1,815.90, 2,505.51 and 1,030.38 is: 1,421.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.90 : 2,505.51 = 1,030.38 : x
  2. Step 2: Convert to fraction form
    1,815.90/2,505.51 = 1,030.38/x
  3. Step 3: Cross multiply
    1,815.90x = 2,505.51 × 1,030.38
  4. Step 4: Simplify right side
    1,815.90x = 2,581,627.39
  5. Step 5: Solve for x
    x = 2,581,627.39/1,815.90
  6. Step 6: Final answer
    x = 1,421.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.