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Finding the Fourth Proportional to 402,354.75, 555,259.55 and 221,078.42

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Solution

The fourth proportional to 402,354.75, 555,259.55 and 221,078.42 is: 305,093.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,354.75 : 555,259.55 = 221,078.42 : x
  2. Step 2: Convert to fraction form
    402,354.75/555,259.55 = 221,078.42/x
  3. Step 3: Cross multiply
    402,354.75x = 555,259.55 × 221,078.42
  4. Step 4: Simplify right side
    402,354.75x = 122,755,900,122.22
  5. Step 5: Solve for x
    x = 122,755,900,122.22/402,354.75
  6. Step 6: Final answer
    x = 305,093.70

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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.