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Finding the Fourth Proportional to 642,069.63, 885,855.20 and 370,100.39

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Solution

The fourth proportional to 642,069.63, 885,855.20 and 370,100.39 is: 510,622.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,069.63 : 885,855.20 = 370,100.39 : x
  2. Step 2: Convert to fraction form
    642,069.63/885,855.20 = 370,100.39/x
  3. Step 3: Cross multiply
    642,069.63x = 885,855.20 × 370,100.39
  4. Step 4: Simplify right side
    642,069.63x = 327,855,348,723.75
  5. Step 5: Solve for x
    x = 327,855,348,723.75/642,069.63
  6. Step 6: Final answer
    x = 510,622.73

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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.