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Finding the Fourth Proportional to 642,813.93, 963,630.41 and 343,501.11

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Solution

The fourth proportional to 642,813.93, 963,630.41 and 343,501.11 is: 514,936.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,813.93 : 963,630.41 = 343,501.11 : x
  2. Step 2: Convert to fraction form
    642,813.93/963,630.41 = 343,501.11/x
  3. Step 3: Cross multiply
    642,813.93x = 963,630.41 × 343,501.11
  4. Step 4: Simplify right side
    642,813.93x = 331,008,113,747.25
  5. Step 5: Solve for x
    x = 331,008,113,747.25/642,813.93
  6. Step 6: Final answer
    x = 514,936.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.