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Finding the Fourth Proportional to 402,592.82, 555,585 and 221,312.39

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Solution

The fourth proportional to 402,592.82, 555,585 and 221,312.39 is: 305,414.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,592.82 : 555,585 = 221,312.39 : x
  2. Step 2: Convert to fraction form
    402,592.82/555,585 = 221,312.39/x
  3. Step 3: Cross multiply
    402,592.82x = 555,585 × 221,312.39
  4. Step 4: Simplify right side
    402,592.82x = 122,957,845,587.11
  5. Step 5: Solve for x
    x = 122,957,845,587.11/402,592.82
  6. Step 6: Final answer
    x = 305,414.90

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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.