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Finding the Fourth Proportional to 665,215.44, 917,997 and 359,291.76

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Solution

The fourth proportional to 665,215.44, 917,997 and 359,291.76 is: 495,822.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,215.44 : 917,997 = 359,291.76 : x
  2. Step 2: Convert to fraction form
    665,215.44/917,997 = 359,291.76/x
  3. Step 3: Cross multiply
    665,215.44x = 917,997 × 359,291.76
  4. Step 4: Simplify right side
    665,215.44x = 329,828,757,804.72
  5. Step 5: Solve for x
    x = 329,828,757,804.72/665,215.44
  6. Step 6: Final answer
    x = 495,822.46

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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.