Home / 389,583,143.75-537,641,638.22-215,742,887.75

Finding the Fourth Proportional to 389,583,143.75, 537,641,638.22 and 215,742,887.75

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Solution

The fourth proportional to 389,583,143.75, 537,641,638.22 and 215,742,887.75 is: 297,734,543.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,583,143.75 : 537,641,638.22 = 215,742,887.75 : x
  2. Step 2: Convert to fraction form
    389,583,143.75/537,641,638.22 = 215,742,887.75/x
  3. Step 3: Cross multiply
    389,583,143.75x = 537,641,638.22 × 215,742,887.75
  4. Step 4: Simplify right side
    389,583,143.75x = 115,992,359,603,144,864
  5. Step 5: Solve for x
    x = 115,992,359,603,144,864/389,583,143.75
  6. Step 6: Final answer
    x = 297,734,543.87

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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.