Home / 458,981.21-687,979.59-221,997.89

Finding the Fourth Proportional to 458,981.21, 687,979.59 and 221,997.89

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Solution

The fourth proportional to 458,981.21, 687,979.59 and 221,997.89 is: 332,758.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,981.21 : 687,979.59 = 221,997.89 : x
  2. Step 2: Convert to fraction form
    458,981.21/687,979.59 = 221,997.89/x
  3. Step 3: Cross multiply
    458,981.21x = 687,979.59 × 221,997.89
  4. Step 4: Simplify right side
    458,981.21x = 152,730,013,903.17
  5. Step 5: Solve for x
    x = 152,730,013,903.17/458,981.21
  6. Step 6: Final answer
    x = 332,758.75

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1.5x scale

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.