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Finding the Fourth Proportional to 642,204.98, 886,262.88 and 355,751.72

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Solution

The fourth proportional to 642,204.98, 886,262.88 and 355,751.72 is: 490,948.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,204.98 : 886,262.88 = 355,751.72 : x
  2. Step 2: Convert to fraction form
    642,204.98/886,262.88 = 355,751.72/x
  3. Step 3: Cross multiply
    642,204.98x = 886,262.88 × 355,751.72
  4. Step 4: Simplify right side
    642,204.98x = 315,289,543,932.15
  5. Step 5: Solve for x
    x = 315,289,543,932.15/642,204.98
  6. Step 6: Final answer
    x = 490,948.46

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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.