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Finding the Fourth Proportional to 802.36, 1,106.90 and 628.20

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Solution

The fourth proportional to 802.36, 1,106.90 and 628.20 is: 866.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.36 : 1,106.90 = 628.20 : x
  2. Step 2: Convert to fraction form
    802.36/1,106.90 = 628.20/x
  3. Step 3: Cross multiply
    802.36x = 1,106.90 × 628.20
  4. Step 4: Simplify right side
    802.36x = 695,354.58
  5. Step 5: Solve for x
    x = 695,354.58/802.36
  6. Step 6: Final answer
    x = 866.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.