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Finding the Fourth Proportional to 664,930.20, 998,021.70 and 349,613.40

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Solution

The fourth proportional to 664,930.20, 998,021.70 and 349,613.40 is: 524,749.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,930.20 : 998,021.70 = 349,613.40 : x
  2. Step 2: Convert to fraction form
    664,930.20/998,021.70 = 349,613.40/x
  3. Step 3: Cross multiply
    664,930.20x = 998,021.70 × 349,613.40
  4. Step 4: Simplify right side
    664,930.20x = 348,921,759,810.78
  5. Step 5: Solve for x
    x = 348,921,759,810.78/664,930.20
  6. Step 6: Final answer
    x = 524,749.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.