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Finding the Fourth Proportional to 402,609.45, 555,602.85 and 221,333.07

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Solution

The fourth proportional to 402,609.45, 555,602.85 and 221,333.07 is: 305,440.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,609.45 : 555,602.85 = 221,333.07 : x
  2. Step 2: Convert to fraction form
    402,609.45/555,602.85 = 221,333.07/x
  3. Step 3: Cross multiply
    402,609.45x = 555,602.85 × 221,333.07
  4. Step 4: Simplify right side
    402,609.45x = 122,973,284,491.25
  5. Step 5: Solve for x
    x = 122,973,284,491.25/402,609.45
  6. Step 6: Final answer
    x = 305,440.63

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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.