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Finding the Fourth Proportional to 642,262.54, 886,257.66 and 355,729.09

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Solution

The fourth proportional to 642,262.54, 886,257.66 and 355,729.09 is: 490,870.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,262.54 : 886,257.66 = 355,729.09 : x
  2. Step 2: Convert to fraction form
    642,262.54/886,257.66 = 355,729.09/x
  3. Step 3: Cross multiply
    642,262.54x = 886,257.66 × 355,729.09
  4. Step 4: Simplify right side
    642,262.54x = 315,267,630,897.33
  5. Step 5: Solve for x
    x = 315,267,630,897.33/642,262.54
  6. Step 6: Final answer
    x = 490,870.34

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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.