Home / 811,121.18-1,216,576.02-212,128.54

Finding the Fourth Proportional to 811,121.18, 1,216,576.02 and 212,128.54

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Solution

The fourth proportional to 811,121.18, 1,216,576.02 and 212,128.54 is: 318,165.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,121.18 : 1,216,576.02 = 212,128.54 : x
  2. Step 2: Convert to fraction form
    811,121.18/1,216,576.02 = 212,128.54/x
  3. Step 3: Cross multiply
    811,121.18x = 1,216,576.02 × 212,128.54
  4. Step 4: Simplify right side
    811,121.18x = 258,070,492,675.65
  5. Step 5: Solve for x
    x = 258,070,492,675.65/811,121.18
  6. Step 6: Final answer
    x = 318,165.15

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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.