Home / 811,831.02-1,217,751.72-212,787

Finding the Fourth Proportional to 811,831.02, 1,217,751.72 and 212,787

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Solution

The fourth proportional to 811,831.02, 1,217,751.72 and 212,787 is: 319,181.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,831.02 : 1,217,751.72 = 212,787 : x
  2. Step 2: Convert to fraction form
    811,831.02/1,217,751.72 = 212,787/x
  3. Step 3: Cross multiply
    811,831.02x = 1,217,751.72 × 212,787
  4. Step 4: Simplify right side
    811,831.02x = 259,121,735,243.64
  5. Step 5: Solve for x
    x = 259,121,735,243.64/811,831.02
  6. Step 6: Final answer
    x = 319,181.86

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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.