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Finding the Fourth Proportional to 1,528.25, 2,109.47 and 976.25

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Solution

The fourth proportional to 1,528.25, 2,109.47 and 976.25 is: 1,347.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.25 : 2,109.47 = 976.25 : x
  2. Step 2: Convert to fraction form
    1,528.25/2,109.47 = 976.25/x
  3. Step 3: Cross multiply
    1,528.25x = 2,109.47 × 976.25
  4. Step 4: Simplify right side
    1,528.25x = 2,059,365.21
  5. Step 5: Solve for x
    x = 2,059,365.21/1,528.25
  6. Step 6: Final answer
    x = 1,347.53

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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.