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Finding the Fourth Proportional to 4,989, 7,484.64 and 2,799.24

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Solution

The fourth proportional to 4,989, 7,484.64 and 2,799.24 is: 4,199.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989 : 7,484.64 = 2,799.24 : x
  2. Step 2: Convert to fraction form
    4,989/7,484.64 = 2,799.24/x
  3. Step 3: Cross multiply
    4,989x = 7,484.64 × 2,799.24
  4. Step 4: Simplify right side
    4,989x = 20,951,303.67
  5. Step 5: Solve for x
    x = 20,951,303.67/4,989
  6. Step 6: Final answer
    x = 4,199.50

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Double scale
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1.5x scale

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.