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Finding the Fourth Proportional to 3,145.70, 4,718.01 and 953.90

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Solution

The fourth proportional to 3,145.70, 4,718.01 and 953.90 is: 1,430.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.70 : 4,718.01 = 953.90 : x
  2. Step 2: Convert to fraction form
    3,145.70/4,718.01 = 953.90/x
  3. Step 3: Cross multiply
    3,145.70x = 4,718.01 × 953.90
  4. Step 4: Simplify right side
    3,145.70x = 4,500,486.15
  5. Step 5: Solve for x
    x = 4,500,486.15/3,145.70
  6. Step 6: Final answer
    x = 1,430.68

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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.