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Finding the Fourth Proportional to 3,189.72, 4,784.58 and 1,457.40

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Solution

The fourth proportional to 3,189.72, 4,784.58 and 1,457.40 is: 2,186.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.72 : 4,784.58 = 1,457.40 : x
  2. Step 2: Convert to fraction form
    3,189.72/4,784.58 = 1,457.40/x
  3. Step 3: Cross multiply
    3,189.72x = 4,784.58 × 1,457.40
  4. Step 4: Simplify right side
    3,189.72x = 6,973,046.89
  5. Step 5: Solve for x
    x = 6,973,046.89/3,189.72
  6. Step 6: Final answer
    x = 2,186.10

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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.