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Finding the Fourth Proportional to 1,536.93, 2,308.47 and 921.78

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Solution

The fourth proportional to 1,536.93, 2,308.47 and 921.78 is: 1,384.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,536.93 : 2,308.47 = 921.78 : x
  2. Step 2: Convert to fraction form
    1,536.93/2,308.47 = 921.78/x
  3. Step 3: Cross multiply
    1,536.93x = 2,308.47 × 921.78
  4. Step 4: Simplify right side
    1,536.93x = 2,127,901.48
  5. Step 5: Solve for x
    x = 2,127,901.48/1,536.93
  6. Step 6: Final answer
    x = 1,384.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.