Home / 811,223.72-1,216,742.60-212,242.68

Finding the Fourth Proportional to 811,223.72, 1,216,742.60 and 212,242.68

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Solution

The fourth proportional to 811,223.72, 1,216,742.60 and 212,242.68 is: 318,339.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,223.72 : 1,216,742.60 = 212,242.68 : x
  2. Step 2: Convert to fraction form
    811,223.72/1,216,742.60 = 212,242.68/x
  3. Step 3: Cross multiply
    811,223.72x = 1,216,742.60 × 212,242.68
  4. Step 4: Simplify right side
    811,223.72x = 258,244,710,294.17
  5. Step 5: Solve for x
    x = 258,244,710,294.17/811,223.72
  6. Step 6: Final answer
    x = 318,339.69

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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.