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Finding the Fourth Proportional to 1,201.34, 1,657.86 and 649.34

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Solution

The fourth proportional to 1,201.34, 1,657.86 and 649.34 is: 896.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,201.34 : 1,657.86 = 649.34 : x
  2. Step 2: Convert to fraction form
    1,201.34/1,657.86 = 649.34/x
  3. Step 3: Cross multiply
    1,201.34x = 1,657.86 × 649.34
  4. Step 4: Simplify right side
    1,201.34x = 1,076,514.81
  5. Step 5: Solve for x
    x = 1,076,514.81/1,201.34
  6. Step 6: Final answer
    x = 896.10

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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.