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Finding the Fourth Proportional to 1,556.34, 2,332.08 and 978

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Solution

The fourth proportional to 1,556.34, 2,332.08 and 978 is: 1,465.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.34 : 2,332.08 = 978 : x
  2. Step 2: Convert to fraction form
    1,556.34/2,332.08 = 978/x
  3. Step 3: Cross multiply
    1,556.34x = 2,332.08 × 978
  4. Step 4: Simplify right side
    1,556.34x = 2,280,774.24
  5. Step 5: Solve for x
    x = 2,280,774.24/1,556.34
  6. Step 6: Final answer
    x = 1,465.47

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