Home / 1,210.30-1,810.05-1,015.90

Finding the Fourth Proportional to 1,210.30, 1,810.05 and 1,015.90

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Solution

The fourth proportional to 1,210.30, 1,810.05 and 1,015.90 is: 1,519.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.30 : 1,810.05 = 1,015.90 : x
  2. Step 2: Convert to fraction form
    1,210.30/1,810.05 = 1,015.90/x
  3. Step 3: Cross multiply
    1,210.30x = 1,810.05 × 1,015.90
  4. Step 4: Simplify right side
    1,210.30x = 1,838,829.80
  5. Step 5: Solve for x
    x = 1,838,829.80/1,210.30
  6. Step 6: Final answer
    x = 1,519.32

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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.