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Finding the Fourth Proportional to 846.81, 1,270.72 and 384.59

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Solution

The fourth proportional to 846.81, 1,270.72 and 384.59 is: 577.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.81 : 1,270.72 = 384.59 : x
  2. Step 2: Convert to fraction form
    846.81/1,270.72 = 384.59/x
  3. Step 3: Cross multiply
    846.81x = 1,270.72 × 384.59
  4. Step 4: Simplify right side
    846.81x = 488,699.85
  5. Step 5: Solve for x
    x = 488,699.85/846.81
  6. Step 6: Final answer
    x = 577.11

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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.