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Finding the Fourth Proportional to 802.10, 1,107.15 and 470.66

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Solution

The fourth proportional to 802.10, 1,107.15 and 470.66 is: 649.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.10 : 1,107.15 = 470.66 : x
  2. Step 2: Convert to fraction form
    802.10/1,107.15 = 470.66/x
  3. Step 3: Cross multiply
    802.10x = 1,107.15 × 470.66
  4. Step 4: Simplify right side
    802.10x = 521,091.22
  5. Step 5: Solve for x
    x = 521,091.22/802.10
  6. Step 6: Final answer
    x = 649.66

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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.