Home / 2,985.30-4,120.29-1,807.38

Finding the Fourth Proportional to 2,985.30, 4,120.29 and 1,807.38

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Solution

The fourth proportional to 2,985.30, 4,120.29 and 1,807.38 is: 2,494.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.30 : 4,120.29 = 1,807.38 : x
  2. Step 2: Convert to fraction form
    2,985.30/4,120.29 = 1,807.38/x
  3. Step 3: Cross multiply
    2,985.30x = 4,120.29 × 1,807.38
  4. Step 4: Simplify right side
    2,985.30x = 7,446,929.74
  5. Step 5: Solve for x
    x = 7,446,929.74/2,985.30
  6. Step 6: Final answer
    x = 2,494.53

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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.