Home / 2,478.03-3,411.21-1,916.70

Finding the Fourth Proportional to 2,478.03, 3,411.21 and 1,916.70

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Solution

The fourth proportional to 2,478.03, 3,411.21 and 1,916.70 is: 2,638.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.03 : 3,411.21 = 1,916.70 : x
  2. Step 2: Convert to fraction form
    2,478.03/3,411.21 = 1,916.70/x
  3. Step 3: Cross multiply
    2,478.03x = 3,411.21 × 1,916.70
  4. Step 4: Simplify right side
    2,478.03x = 6,538,260.60
  5. Step 5: Solve for x
    x = 6,538,260.60/2,478.03
  6. Step 6: Final answer
    x = 2,638.50

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1.5x scale

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.