Home / 450,915.76-621,964.37-289,974.43

Finding the Fourth Proportional to 450,915.76, 621,964.37 and 289,974.43

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Solution

The fourth proportional to 450,915.76, 621,964.37 and 289,974.43 is: 399,972.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,915.76 : 621,964.37 = 289,974.43 : x
  2. Step 2: Convert to fraction form
    450,915.76/621,964.37 = 289,974.43/x
  3. Step 3: Cross multiply
    450,915.76x = 621,964.37 × 289,974.43
  4. Step 4: Simplify right side
    450,915.76x = 180,353,765,173.45
  5. Step 5: Solve for x
    x = 180,353,765,173.45/450,915.76
  6. Step 6: Final answer
    x = 399,972.19

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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.