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Finding the Fourth Proportional to 802.15, 1,106.42 and 487.19

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Solution

The fourth proportional to 802.15, 1,106.42 and 487.19 is: 671.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.15 : 1,106.42 = 487.19 : x
  2. Step 2: Convert to fraction form
    802.15/1,106.42 = 487.19/x
  3. Step 3: Cross multiply
    802.15x = 1,106.42 × 487.19
  4. Step 4: Simplify right side
    802.15x = 539,037.09
  5. Step 5: Solve for x
    x = 539,037.09/802.15
  6. Step 6: Final answer
    x = 671.99

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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.