Home / 3,916.89-5,875.74-1,320.03

Finding the Fourth Proportional to 3,916.89, 5,875.74 and 1,320.03

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Solution

The fourth proportional to 3,916.89, 5,875.74 and 1,320.03 is: 1,980.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916.89 : 5,875.74 = 1,320.03 : x
  2. Step 2: Convert to fraction form
    3,916.89/5,875.74 = 1,320.03/x
  3. Step 3: Cross multiply
    3,916.89x = 5,875.74 × 1,320.03
  4. Step 4: Simplify right side
    3,916.89x = 7,756,153.07
  5. Step 5: Solve for x
    x = 7,756,153.07/3,916.89
  6. Step 6: Final answer
    x = 1,980.18

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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.