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Finding the Fourth Proportional to 1,203.63, 1,661.01 and 651.63

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Solution

The fourth proportional to 1,203.63, 1,661.01 and 651.63 is: 899.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.63 : 1,661.01 = 651.63 : x
  2. Step 2: Convert to fraction form
    1,203.63/1,661.01 = 651.63/x
  3. Step 3: Cross multiply
    1,203.63x = 1,661.01 × 651.63
  4. Step 4: Simplify right side
    1,203.63x = 1,082,360.69
  5. Step 5: Solve for x
    x = 1,082,360.69/1,203.63
  6. Step 6: Final answer
    x = 899.25

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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.