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Finding the Fourth Proportional to 345,435.78, 518,224.14 and 145,756.20

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Solution

The fourth proportional to 345,435.78, 518,224.14 and 145,756.20 is: 218,664.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,435.78 : 518,224.14 = 145,756.20 : x
  2. Step 2: Convert to fraction form
    345,435.78/518,224.14 = 145,756.20/x
  3. Step 3: Cross multiply
    345,435.78x = 518,224.14 × 145,756.20
  4. Step 4: Simplify right side
    345,435.78x = 75,534,381,394.67
  5. Step 5: Solve for x
    x = 75,534,381,394.67/345,435.78
  6. Step 6: Final answer
    x = 218,664.03

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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.