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Finding the Fourth Proportional to 345,485.84, 518,298.42 and 145,806.44

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Solution

The fourth proportional to 345,485.84, 518,298.42 and 145,806.44 is: 218,739.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,485.84 : 518,298.42 = 145,806.44 : x
  2. Step 2: Convert to fraction form
    345,485.84/518,298.42 = 145,806.44/x
  3. Step 3: Cross multiply
    345,485.84x = 518,298.42 × 145,806.44
  4. Step 4: Simplify right side
    345,485.84x = 75,571,247,477.82
  5. Step 5: Solve for x
    x = 75,571,247,477.82/345,485.84
  6. Step 6: Final answer
    x = 218,739.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.