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Finding the Fourth Proportional to 402,605.52, 555,608.04 and 221,331.30

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Solution

The fourth proportional to 402,605.52, 555,608.04 and 221,331.30 is: 305,444.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,605.52 : 555,608.04 = 221,331.30 : x
  2. Step 2: Convert to fraction form
    402,605.52/555,608.04 = 221,331.30/x
  3. Step 3: Cross multiply
    402,605.52x = 555,608.04 × 221,331.30
  4. Step 4: Simplify right side
    402,605.52x = 122,973,449,783.65
  5. Step 5: Solve for x
    x = 122,973,449,783.65/402,605.52
  6. Step 6: Final answer
    x = 305,444.02

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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.