Home / 3,180.05-4,386.52-1,985.70

Finding the Fourth Proportional to 3,180.05, 4,386.52 and 1,985.70

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Solution

The fourth proportional to 3,180.05, 4,386.52 and 1,985.70 is: 2,739.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180.05 : 4,386.52 = 1,985.70 : x
  2. Step 2: Convert to fraction form
    3,180.05/4,386.52 = 1,985.70/x
  3. Step 3: Cross multiply
    3,180.05x = 4,386.52 × 1,985.70
  4. Step 4: Simplify right side
    3,180.05x = 8,710,312.76
  5. Step 5: Solve for x
    x = 8,710,312.76/3,180.05
  6. Step 6: Final answer
    x = 2,739.05

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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.