Home / 1,917.36-2,875.92-618.72

Finding the Fourth Proportional to 1,917.36, 2,875.92 and 618.72

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Solution

The fourth proportional to 1,917.36, 2,875.92 and 618.72 is: 928.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.36 : 2,875.92 = 618.72 : x
  2. Step 2: Convert to fraction form
    1,917.36/2,875.92 = 618.72/x
  3. Step 3: Cross multiply
    1,917.36x = 2,875.92 × 618.72
  4. Step 4: Simplify right side
    1,917.36x = 1,779,389.22
  5. Step 5: Solve for x
    x = 1,779,389.22/1,917.36
  6. Step 6: Final answer
    x = 928.04

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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.