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Finding the Fourth Proportional to 642,000.22, 885,959.50 and 355,519.96

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Solution

The fourth proportional to 642,000.22, 885,959.50 and 355,519.96 is: 490,617.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,000.22 : 885,959.50 = 355,519.96 : x
  2. Step 2: Convert to fraction form
    642,000.22/885,959.50 = 355,519.96/x
  3. Step 3: Cross multiply
    642,000.22x = 885,959.50 × 355,519.96
  4. Step 4: Simplify right side
    642,000.22x = 314,976,286,001.62
  5. Step 5: Solve for x
    x = 314,976,286,001.62/642,000.22
  6. Step 6: Final answer
    x = 490,617.10

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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.