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Finding the Fourth Proportional to 665,145, 917,920.26 and 363,358.44

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Solution

The fourth proportional to 665,145, 917,920.26 and 363,358.44 is: 501,445.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,145 : 917,920.26 = 363,358.44 : x
  2. Step 2: Convert to fraction form
    665,145/917,920.26 = 363,358.44/x
  3. Step 3: Cross multiply
    665,145x = 917,920.26 × 363,358.44
  4. Step 4: Simplify right side
    665,145x = 333,534,073,717.99
  5. Step 5: Solve for x
    x = 333,534,073,717.99/665,145
  6. Step 6: Final answer
    x = 501,445.66

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1.5x scale

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.