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Finding the Fourth Proportional to 953.37, 1,430.46 and 645.57

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Solution

The fourth proportional to 953.37, 1,430.46 and 645.57 is: 968.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.37 : 1,430.46 = 645.57 : x
  2. Step 2: Convert to fraction form
    953.37/1,430.46 = 645.57/x
  3. Step 3: Cross multiply
    953.37x = 1,430.46 × 645.57
  4. Step 4: Simplify right side
    953.37x = 923,462.06
  5. Step 5: Solve for x
    x = 923,462.06/953.37
  6. Step 6: Final answer
    x = 968.63

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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.