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Finding the Fourth Proportional to 423,020.40, 634,530.60 and 297,049.20

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Solution

The fourth proportional to 423,020.40, 634,530.60 and 297,049.20 is: 445,573.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,020.40 : 634,530.60 = 297,049.20 : x
  2. Step 2: Convert to fraction form
    423,020.40/634,530.60 = 297,049.20/x
  3. Step 3: Cross multiply
    423,020.40x = 634,530.60 × 297,049.20
  4. Step 4: Simplify right side
    423,020.40x = 188,486,807,105.52
  5. Step 5: Solve for x
    x = 188,486,807,105.52/423,020.40
  6. Step 6: Final answer
    x = 445,573.80

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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.