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Finding the Fourth Proportional to 448,889.40, 619,281.50 and 313,003.80

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Solution

The fourth proportional to 448,889.40, 619,281.50 and 313,003.80 is: 431,815.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,889.40 : 619,281.50 = 313,003.80 : x
  2. Step 2: Convert to fraction form
    448,889.40/619,281.50 = 313,003.80/x
  3. Step 3: Cross multiply
    448,889.40x = 619,281.50 × 313,003.80
  4. Step 4: Simplify right side
    448,889.40x = 193,837,462,769.70
  5. Step 5: Solve for x
    x = 193,837,462,769.70/448,889.40
  6. Step 6: Final answer
    x = 431,815.64

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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.