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Finding the Fourth Proportional to 402,433.76, 555,369 and 221,150.72

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Solution

The fourth proportional to 402,433.76, 555,369 and 221,150.72 is: 305,193.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,433.76 : 555,369 = 221,150.72 : x
  2. Step 2: Convert to fraction form
    402,433.76/555,369 = 221,150.72/x
  3. Step 3: Cross multiply
    402,433.76x = 555,369 × 221,150.72
  4. Step 4: Simplify right side
    402,433.76x = 122,820,254,215.68
  5. Step 5: Solve for x
    x = 122,820,254,215.68/402,433.76
  6. Step 6: Final answer
    x = 305,193.71

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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.