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Finding the Fourth Proportional to 639,641.55, 882,699.37 and 353,163.67

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Solution

The fourth proportional to 639,641.55, 882,699.37 and 353,163.67 is: 487,362.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,641.55 : 882,699.37 = 353,163.67 : x
  2. Step 2: Convert to fraction form
    639,641.55/882,699.37 = 353,163.67/x
  3. Step 3: Cross multiply
    639,641.55x = 882,699.37 × 353,163.67
  4. Step 4: Simplify right side
    639,641.55x = 311,737,349,015.89
  5. Step 5: Solve for x
    x = 311,737,349,015.89/639,641.55
  6. Step 6: Final answer
    x = 487,362.57

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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.