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Finding the Fourth Proportional to 975.78, 1,346.60 and 533.72

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Solution

The fourth proportional to 975.78, 1,346.60 and 533.72 is: 736.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.78 : 1,346.60 = 533.72 : x
  2. Step 2: Convert to fraction form
    975.78/1,346.60 = 533.72/x
  3. Step 3: Cross multiply
    975.78x = 1,346.60 × 533.72
  4. Step 4: Simplify right side
    975.78x = 718,697.95
  5. Step 5: Solve for x
    x = 718,697.95/975.78
  6. Step 6: Final answer
    x = 736.54

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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.