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Finding the Fourth Proportional to 450,040.71, 620,763.55 and 288,640.11

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Solution

The fourth proportional to 450,040.71, 620,763.55 and 288,640.11 is: 398,135.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,040.71 : 620,763.55 = 288,640.11 : x
  2. Step 2: Convert to fraction form
    450,040.71/620,763.55 = 288,640.11/x
  3. Step 3: Cross multiply
    450,040.71x = 620,763.55 × 288,640.11
  4. Step 4: Simplify right side
    450,040.71x = 179,177,260,962.25
  5. Step 5: Solve for x
    x = 179,177,260,962.25/450,040.71
  6. Step 6: Final answer
    x = 398,135.67

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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.