Home / 1,688.68-2,510.23-1,638.85

Finding the Fourth Proportional to 1,688.68, 2,510.23 and 1,638.85

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Solution

The fourth proportional to 1,688.68, 2,510.23 and 1,638.85 is: 2,436.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.68 : 2,510.23 = 1,638.85 : x
  2. Step 2: Convert to fraction form
    1,688.68/2,510.23 = 1,638.85/x
  3. Step 3: Cross multiply
    1,688.68x = 2,510.23 × 1,638.85
  4. Step 4: Simplify right side
    1,688.68x = 4,113,869.69
  5. Step 5: Solve for x
    x = 4,113,869.69/1,688.68
  6. Step 6: Final answer
    x = 2,436.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.