Home / 1,215.18-1,820.13-753.08

Finding the Fourth Proportional to 1,215.18, 1,820.13 and 753.08

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Solution

The fourth proportional to 1,215.18, 1,820.13 and 753.08 is: 1,127.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.18 : 1,820.13 = 753.08 : x
  2. Step 2: Convert to fraction form
    1,215.18/1,820.13 = 753.08/x
  3. Step 3: Cross multiply
    1,215.18x = 1,820.13 × 753.08
  4. Step 4: Simplify right side
    1,215.18x = 1,370,694.40
  5. Step 5: Solve for x
    x = 1,370,694.40/1,215.18
  6. Step 6: Final answer
    x = 1,127.98

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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.