Home / 2,688.90-4,037.40-1,870.80

Finding the Fourth Proportional to 2,688.90, 4,037.40 and 1,870.80

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Solution

The fourth proportional to 2,688.90, 4,037.40 and 1,870.80 is: 2,809.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.90 : 4,037.40 = 1,870.80 : x
  2. Step 2: Convert to fraction form
    2,688.90/4,037.40 = 1,870.80/x
  3. Step 3: Cross multiply
    2,688.90x = 4,037.40 × 1,870.80
  4. Step 4: Simplify right side
    2,688.90x = 7,553,167.92
  5. Step 5: Solve for x
    x = 7,553,167.92/2,688.90
  6. Step 6: Final answer
    x = 2,809.02

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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.