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Finding the Fourth Proportional to 449,065.62, 619,559.28 and 279,289.62

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Solution

The fourth proportional to 449,065.62, 619,559.28 and 279,289.62 is: 385,325.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,065.62 : 619,559.28 = 279,289.62 : x
  2. Step 2: Convert to fraction form
    449,065.62/619,559.28 = 279,289.62/x
  3. Step 3: Cross multiply
    449,065.62x = 619,559.28 × 279,289.62
  4. Step 4: Simplify right side
    449,065.62x = 173,036,475,878.67
  5. Step 5: Solve for x
    x = 173,036,475,878.67/449,065.62
  6. Step 6: Final answer
    x = 385,325.59

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1.5x scale

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.