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Finding the Fourth Proportional to 448,624.15, 618,751.30 and 287,494.19

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Solution

The fourth proportional to 448,624.15, 618,751.30 and 287,494.19 is: 396,517.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,624.15 : 618,751.30 = 287,494.19 : x
  2. Step 2: Convert to fraction form
    448,624.15/618,751.30 = 287,494.19/x
  3. Step 3: Cross multiply
    448,624.15x = 618,751.30 × 287,494.19
  4. Step 4: Simplify right side
    448,624.15x = 177,887,403,804.95
  5. Step 5: Solve for x
    x = 177,887,403,804.95/448,624.15
  6. Step 6: Final answer
    x = 396,517.67

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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.