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Finding the Fourth Proportional to 402,495.57, 555,456.39 and 221,204.21

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Solution

The fourth proportional to 402,495.57, 555,456.39 and 221,204.21 is: 305,268.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,495.57 : 555,456.39 = 221,204.21 : x
  2. Step 2: Convert to fraction form
    402,495.57/555,456.39 = 221,204.21/x
  3. Step 3: Cross multiply
    402,495.57x = 555,456.39 × 221,204.21
  4. Step 4: Simplify right side
    402,495.57x = 122,869,288,332.60
  5. Step 5: Solve for x
    x = 122,869,288,332.60/402,495.57
  6. Step 6: Final answer
    x = 305,268.67

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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.