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Finding the Fourth Proportional to 303,430.20, 455,145.30 and 196,985.40

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Solution

The fourth proportional to 303,430.20, 455,145.30 and 196,985.40 is: 295,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,430.20 : 455,145.30 = 196,985.40 : x
  2. Step 2: Convert to fraction form
    303,430.20/455,145.30 = 196,985.40/x
  3. Step 3: Cross multiply
    303,430.20x = 455,145.30 × 196,985.40
  4. Step 4: Simplify right side
    303,430.20x = 89,656,978,978.62
  5. Step 5: Solve for x
    x = 89,656,978,978.62/303,430.20
  6. Step 6: Final answer
    x = 295,478.10

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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.