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Finding the Fourth Proportional to 448,061.60, 672,092.40 and 289,431.20

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Solution

The fourth proportional to 448,061.60, 672,092.40 and 289,431.20 is: 434,146.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,061.60 : 672,092.40 = 289,431.20 : x
  2. Step 2: Convert to fraction form
    448,061.60/672,092.40 = 289,431.20/x
  3. Step 3: Cross multiply
    448,061.60x = 672,092.40 × 289,431.20
  4. Step 4: Simplify right side
    448,061.60x = 194,524,509,842.88
  5. Step 5: Solve for x
    x = 194,524,509,842.88/448,061.60
  6. Step 6: Final answer
    x = 434,146.80

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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.