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Finding the Fourth Proportional to 802.62, 1,106.83 and 487.93

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Solution

The fourth proportional to 802.62, 1,106.83 and 487.93 is: 672.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.62 : 1,106.83 = 487.93 : x
  2. Step 2: Convert to fraction form
    802.62/1,106.83 = 487.93/x
  3. Step 3: Cross multiply
    802.62x = 1,106.83 × 487.93
  4. Step 4: Simplify right side
    802.62x = 540,055.56
  5. Step 5: Solve for x
    x = 540,055.56/802.62
  6. Step 6: Final answer
    x = 672.87

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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.