Home / 3,178.29-4,385.70-2,587.80

Finding the Fourth Proportional to 3,178.29, 4,385.70 and 2,587.80

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Solution

The fourth proportional to 3,178.29, 4,385.70 and 2,587.80 is: 3,570.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.29 : 4,385.70 = 2,587.80 : x
  2. Step 2: Convert to fraction form
    3,178.29/4,385.70 = 2,587.80/x
  3. Step 3: Cross multiply
    3,178.29x = 4,385.70 × 2,587.80
  4. Step 4: Simplify right side
    3,178.29x = 11,349,314.46
  5. Step 5: Solve for x
    x = 11,349,314.46/3,178.29
  6. Step 6: Final answer
    x = 3,570.89

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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.