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Finding the Fourth Proportional to 953.37, 1,316.16 and 639.09

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Solution

The fourth proportional to 953.37, 1,316.16 and 639.09 is: 882.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.37 : 1,316.16 = 639.09 : x
  2. Step 2: Convert to fraction form
    953.37/1,316.16 = 639.09/x
  3. Step 3: Cross multiply
    953.37x = 1,316.16 × 639.09
  4. Step 4: Simplify right side
    953.37x = 841,144.69
  5. Step 5: Solve for x
    x = 841,144.69/953.37
  6. Step 6: Final answer
    x = 882.29

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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.