Home / 402,583.35-555,558.80-221,291.40

Finding the Fourth Proportional to 402,583.35, 555,558.80 and 221,291.40

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Solution

The fourth proportional to 402,583.35, 555,558.80 and 221,291.40 is: 305,378.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,583.35 : 555,558.80 = 221,291.40 : x
  2. Step 2: Convert to fraction form
    402,583.35/555,558.80 = 221,291.40/x
  3. Step 3: Cross multiply
    402,583.35x = 555,558.80 × 221,291.40
  4. Step 4: Simplify right side
    402,583.35x = 122,940,383,527.86
  5. Step 5: Solve for x
    x = 122,940,383,527.86/402,583.35
  6. Step 6: Final answer
    x = 305,378.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.