Home / 458,228.20-687,515.10-221,780.20

Finding the Fourth Proportional to 458,228.20, 687,515.10 and 221,780.20

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Solution

The fourth proportional to 458,228.20, 687,515.10 and 221,780.20 is: 332,753.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,228.20 : 687,515.10 = 221,780.20 : x
  2. Step 2: Convert to fraction form
    458,228.20/687,515.10 = 221,780.20/x
  3. Step 3: Cross multiply
    458,228.20x = 687,515.10 × 221,780.20
  4. Step 4: Simplify right side
    458,228.20x = 152,477,236,381.02
  5. Step 5: Solve for x
    x = 152,477,236,381.02/458,228.20
  6. Step 6: Final answer
    x = 332,753.93

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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.