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Finding the Fourth Proportional to 651.54, 899.12 and 356.80

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Solution

The fourth proportional to 651.54, 899.12 and 356.80 is: 492.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.54 : 899.12 = 356.80 : x
  2. Step 2: Convert to fraction form
    651.54/899.12 = 356.80/x
  3. Step 3: Cross multiply
    651.54x = 899.12 × 356.80
  4. Step 4: Simplify right side
    651.54x = 320,804.23
  5. Step 5: Solve for x
    x = 320,804.23/651.54
  6. Step 6: Final answer
    x = 492.38

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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.