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Finding the Fourth Proportional to 661,065.12, 912,234.96 and 374,588.64

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Solution

The fourth proportional to 661,065.12, 912,234.96 and 374,588.64 is: 516,912.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,065.12 : 912,234.96 = 374,588.64 : x
  2. Step 2: Convert to fraction form
    661,065.12/912,234.96 = 374,588.64/x
  3. Step 3: Cross multiply
    661,065.12x = 912,234.96 × 374,588.64
  4. Step 4: Simplify right side
    661,065.12x = 341,712,853,026.85
  5. Step 5: Solve for x
    x = 341,712,853,026.85/661,065.12
  6. Step 6: Final answer
    x = 516,912.54

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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.