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Finding the Fourth Proportional to 402,608.25, 555,606.41 and 221,327.82

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Solution

The fourth proportional to 402,608.25, 555,606.41 and 221,327.82 is: 305,436.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,608.25 : 555,606.41 = 221,327.82 : x
  2. Step 2: Convert to fraction form
    402,608.25/555,606.41 = 221,327.82/x
  3. Step 3: Cross multiply
    402,608.25x = 555,606.41 × 221,327.82
  4. Step 4: Simplify right side
    402,608.25x = 122,971,154,396.69
  5. Step 5: Solve for x
    x = 122,971,154,396.69/402,608.25
  6. Step 6: Final answer
    x = 305,436.25

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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.