Home / 670,315.68-1,005,510.78-221,018.40

Finding the Fourth Proportional to 670,315.68, 1,005,510.78 and 221,018.40

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Solution

The fourth proportional to 670,315.68, 1,005,510.78 and 221,018.40 is: 331,539.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,315.68 : 1,005,510.78 = 221,018.40 : x
  2. Step 2: Convert to fraction form
    670,315.68/1,005,510.78 = 221,018.40/x
  3. Step 3: Cross multiply
    670,315.68x = 1,005,510.78 × 221,018.40
  4. Step 4: Simplify right side
    670,315.68x = 222,236,383,778.35
  5. Step 5: Solve for x
    x = 222,236,383,778.35/670,315.68
  6. Step 6: Final answer
    x = 331,539.89

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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.