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Finding the Fourth Proportional to 1,204.35, 1,802.61 and 647.64

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Solution

The fourth proportional to 1,204.35, 1,802.61 and 647.64 is: 969.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,204.35 : 1,802.61 = 647.64 : x
  2. Step 2: Convert to fraction form
    1,204.35/1,802.61 = 647.64/x
  3. Step 3: Cross multiply
    1,204.35x = 1,802.61 × 647.64
  4. Step 4: Simplify right side
    1,204.35x = 1,167,442.34
  5. Step 5: Solve for x
    x = 1,167,442.34/1,204.35
  6. Step 6: Final answer
    x = 969.35

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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.