Home / 1,678.85-2,507.30-1,429.40

Finding the Fourth Proportional to 1,678.85, 2,507.30 and 1,429.40

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Solution

The fourth proportional to 1,678.85, 2,507.30 and 1,429.40 is: 2,134.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.85 : 2,507.30 = 1,429.40 : x
  2. Step 2: Convert to fraction form
    1,678.85/2,507.30 = 1,429.40/x
  3. Step 3: Cross multiply
    1,678.85x = 2,507.30 × 1,429.40
  4. Step 4: Simplify right side
    1,678.85x = 3,583,914.94
  5. Step 5: Solve for x
    x = 3,583,914.94/1,678.85
  6. Step 6: Final answer
    x = 2,134.74

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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.