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Finding the Fourth Proportional to 3,287.31, 4,931.01 and 947.36

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Solution

The fourth proportional to 3,287.31, 4,931.01 and 947.36 is: 1,421.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,287.31 : 4,931.01 = 947.36 : x
  2. Step 2: Convert to fraction form
    3,287.31/4,931.01 = 947.36/x
  3. Step 3: Cross multiply
    3,287.31x = 4,931.01 × 947.36
  4. Step 4: Simplify right side
    3,287.31x = 4,671,416.98
  5. Step 5: Solve for x
    x = 4,671,416.98/3,287.31
  6. Step 6: Final answer
    x = 1,421.05

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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.