Home / 1,916.65-2,875.85-1,138.19

Finding the Fourth Proportional to 1,916.65, 2,875.85 and 1,138.19

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Solution

The fourth proportional to 1,916.65, 2,875.85 and 1,138.19 is: 1,707.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.65 : 2,875.85 = 1,138.19 : x
  2. Step 2: Convert to fraction form
    1,916.65/2,875.85 = 1,138.19/x
  3. Step 3: Cross multiply
    1,916.65x = 2,875.85 × 1,138.19
  4. Step 4: Simplify right side
    1,916.65x = 3,273,263.71
  5. Step 5: Solve for x
    x = 3,273,263.71/1,916.65
  6. Step 6: Final answer
    x = 1,707.80

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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.