Home / 1,899.40-2,615.32-1,428

Finding the Fourth Proportional to 1,899.40, 2,615.32 and 1,428

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Solution

The fourth proportional to 1,899.40, 2,615.32 and 1,428 is: 1,966.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,899.40 : 2,615.32 = 1,428 : x
  2. Step 2: Convert to fraction form
    1,899.40/2,615.32 = 1,428/x
  3. Step 3: Cross multiply
    1,899.40x = 2,615.32 × 1,428
  4. Step 4: Simplify right side
    1,899.40x = 3,734,676.96
  5. Step 5: Solve for x
    x = 3,734,676.96/1,899.40
  6. Step 6: Final answer
    x = 1,966.24

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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.