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Finding the Fourth Proportional to 442,985.22, 611,106.80 and 289,955.97

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Solution

The fourth proportional to 442,985.22, 611,106.80 and 289,955.97 is: 399,999.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,985.22 : 611,106.80 = 289,955.97 : x
  2. Step 2: Convert to fraction form
    442,985.22/611,106.80 = 289,955.97/x
  3. Step 3: Cross multiply
    442,985.22x = 611,106.80 × 289,955.97
  4. Step 4: Simplify right side
    442,985.22x = 177,194,063,517.82
  5. Step 5: Solve for x
    x = 177,194,063,517.82/442,985.22
  6. Step 6: Final answer
    x = 399,999.94

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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.