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Finding the Fourth Proportional to 402,593.33, 555,585.69 and 221,312.90

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Solution

The fourth proportional to 402,593.33, 555,585.69 and 221,312.90 is: 305,415.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,593.33 : 555,585.69 = 221,312.90 : x
  2. Step 2: Convert to fraction form
    402,593.33/555,585.69 = 221,312.90/x
  3. Step 3: Cross multiply
    402,593.33x = 555,585.69 × 221,312.90
  4. Step 4: Simplify right side
    402,593.33x = 122,958,277,474.47
  5. Step 5: Solve for x
    x = 122,958,277,474.47/402,593.33
  6. Step 6: Final answer
    x = 305,415.59

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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.