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Finding the Fourth Proportional to 3,145.03, 4,718.45 and 953.78

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Solution

The fourth proportional to 3,145.03, 4,718.45 and 953.78 is: 1,430.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.03 : 4,718.45 = 953.78 : x
  2. Step 2: Convert to fraction form
    3,145.03/4,718.45 = 953.78/x
  3. Step 3: Cross multiply
    3,145.03x = 4,718.45 × 953.78
  4. Step 4: Simplify right side
    3,145.03x = 4,500,342.03
  5. Step 5: Solve for x
    x = 4,500,342.03/3,145.03
  6. Step 6: Final answer
    x = 1,430.94

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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.