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Finding the Fourth Proportional to 666,485.12, 919,745.74 and 360,560.68

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Solution

The fourth proportional to 666,485.12, 919,745.74 and 360,560.68 is: 497,571.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,485.12 : 919,745.74 = 360,560.68 : x
  2. Step 2: Convert to fraction form
    666,485.12/919,745.74 = 360,560.68/x
  3. Step 3: Cross multiply
    666,485.12x = 919,745.74 × 360,560.68
  4. Step 4: Simplify right side
    666,485.12x = 331,624,149,441.50
  5. Step 5: Solve for x
    x = 331,624,149,441.50/666,485.12
  6. Step 6: Final answer
    x = 497,571.72

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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.