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Finding the Fourth Proportional to 1,201,761, 1,658,430.18 and 665,217

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Solution

The fourth proportional to 1,201,761, 1,658,430.18 and 665,217 is: 917,999.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201,761 : 1,658,430.18 = 665,217 : x
  2. Step 2: Convert to fraction form
    1,201,761/1,658,430.18 = 665,217/x
  3. Step 3: Cross multiply
    1,201,761x = 1,658,430.18 × 665,217
  4. Step 4: Simplify right side
    1,201,761x = 1,103,215,949,049.06
  5. Step 5: Solve for x
    x = 1,103,215,949,049.06/1,201,761
  6. Step 6: Final answer
    x = 917,999.46

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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.