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Finding the Fourth Proportional to 847.18, 1,270.68 and 384.83

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Solution

The fourth proportional to 847.18, 1,270.68 and 384.83 is: 577.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.18 : 1,270.68 = 384.83 : x
  2. Step 2: Convert to fraction form
    847.18/1,270.68 = 384.83/x
  3. Step 3: Cross multiply
    847.18x = 1,270.68 × 384.83
  4. Step 4: Simplify right side
    847.18x = 488,999.11
  5. Step 5: Solve for x
    x = 488,999.11/847.18
  6. Step 6: Final answer
    x = 577.21

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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.