Home / 402,431.76-555,366.24-221,148.72

Finding the Fourth Proportional to 402,431.76, 555,366.24 and 221,148.72

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Solution

The fourth proportional to 402,431.76, 555,366.24 and 221,148.72 is: 305,190.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,431.76 : 555,366.24 = 221,148.72 : x
  2. Step 2: Convert to fraction form
    402,431.76/555,366.24 = 221,148.72/x
  3. Step 3: Cross multiply
    402,431.76x = 555,366.24 × 221,148.72
  4. Step 4: Simplify right side
    402,431.76x = 122,818,533,107.21
  5. Step 5: Solve for x
    x = 122,818,533,107.21/402,431.76
  6. Step 6: Final answer
    x = 305,190.95

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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.