Finding the Fourth Proportional to 389,583,135, 537,641,626.14 and 215,742,879
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Solution
The fourth proportional to 389,583,135, 537,641,626.14 and 215,742,879 is: 297,734,531.79
Step by Step Solution
- Step 1: Write the proportion equation
389,583,135 : 537,641,626.14 = 215,742,879 : x - Step 2: Convert to fraction form
389,583,135/537,641,626.14 = 215,742,879/x - Step 3: Cross multiply
389,583,135x = 537,641,626.14 × 215,742,879 - Step 4: Simplify right side
389,583,135x = 115,992,352,293,685,248 - Step 5: Solve for x
x = 115,992,352,293,685,248/389,583,135 - Step 6: Final answer
x = 297,734,531.79
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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.