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Finding the Fourth Proportional to 1,530.86, 2,112.60 and 901.64

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Solution

The fourth proportional to 1,530.86, 2,112.60 and 901.64 is: 1,244.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.86 : 2,112.60 = 901.64 : x
  2. Step 2: Convert to fraction form
    1,530.86/2,112.60 = 901.64/x
  3. Step 3: Cross multiply
    1,530.86x = 2,112.60 × 901.64
  4. Step 4: Simplify right side
    1,530.86x = 1,904,796.37
  5. Step 5: Solve for x
    x = 1,904,796.37/1,530.86
  6. Step 6: Final answer
    x = 1,244.27

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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.