Home / 2,655.04-3,985.80-1,685.20

Finding the Fourth Proportional to 2,655.04, 3,985.80 and 1,685.20

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Solution

The fourth proportional to 2,655.04, 3,985.80 and 1,685.20 is: 2,529.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655.04 : 3,985.80 = 1,685.20 : x
  2. Step 2: Convert to fraction form
    2,655.04/3,985.80 = 1,685.20/x
  3. Step 3: Cross multiply
    2,655.04x = 3,985.80 × 1,685.20
  4. Step 4: Simplify right side
    2,655.04x = 6,716,870.16
  5. Step 5: Solve for x
    x = 6,716,870.16/2,655.04
  6. Step 6: Final answer
    x = 2,529.86

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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.