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Finding the Fourth Proportional to 665,378.82, 918,241.65 and 371,035.26

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Solution

The fourth proportional to 665,378.82, 918,241.65 and 371,035.26 is: 512,039.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,378.82 : 918,241.65 = 371,035.26 : x
  2. Step 2: Convert to fraction form
    665,378.82/918,241.65 = 371,035.26/x
  3. Step 3: Cross multiply
    665,378.82x = 918,241.65 × 371,035.26
  4. Step 4: Simplify right side
    665,378.82x = 340,700,029,350.58
  5. Step 5: Solve for x
    x = 340,700,029,350.58/665,378.82
  6. Step 6: Final answer
    x = 512,039.19

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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.