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Finding the Fourth Proportional to 666,540.75, 919,825.75 and 360,617.28

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Solution

The fourth proportional to 666,540.75, 919,825.75 and 360,617.28 is: 497,651.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,540.75 : 919,825.75 = 360,617.28 : x
  2. Step 2: Convert to fraction form
    666,540.75/919,825.75 = 360,617.28/x
  3. Step 3: Cross multiply
    666,540.75x = 919,825.75 × 360,617.28
  4. Step 4: Simplify right side
    666,540.75x = 331,705,060,038.96
  5. Step 5: Solve for x
    x = 331,705,060,038.96/666,540.75
  6. Step 6: Final answer
    x = 497,651.58

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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.