Home / 345,420.55-518,200.68-145,741.36

Finding the Fourth Proportional to 345,420.55, 518,200.68 and 145,741.36

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Solution

The fourth proportional to 345,420.55, 518,200.68 and 145,741.36 is: 218,641.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,420.55 : 518,200.68 = 145,741.36 : x
  2. Step 2: Convert to fraction form
    345,420.55/518,200.68 = 145,741.36/x
  3. Step 3: Cross multiply
    345,420.55x = 518,200.68 × 145,741.36
  4. Step 4: Simplify right side
    345,420.55x = 75,523,271,856.12
  5. Step 5: Solve for x
    x = 75,523,271,856.12/345,420.55
  6. Step 6: Final answer
    x = 218,641.51

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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.