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Finding the Fourth Proportional to 330,007.28, 455,421 and 186,765.68

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Solution

The fourth proportional to 330,007.28, 455,421 and 186,765.68 is: 257,742.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,007.28 : 455,421 = 186,765.68 : x
  2. Step 2: Convert to fraction form
    330,007.28/455,421 = 186,765.68/x
  3. Step 3: Cross multiply
    330,007.28x = 455,421 × 186,765.68
  4. Step 4: Simplify right side
    330,007.28x = 85,057,012,751.28
  5. Step 5: Solve for x
    x = 85,057,012,751.28/330,007.28
  6. Step 6: Final answer
    x = 257,742.84

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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.