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Finding the Fourth Proportional to 802.76, 1,106.28 and 553.63

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Solution

The fourth proportional to 802.76, 1,106.28 and 553.63 is: 762.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.76 : 1,106.28 = 553.63 : x
  2. Step 2: Convert to fraction form
    802.76/1,106.28 = 553.63/x
  3. Step 3: Cross multiply
    802.76x = 1,106.28 × 553.63
  4. Step 4: Simplify right side
    802.76x = 612,467.03
  5. Step 5: Solve for x
    x = 612,467.03/802.76
  6. Step 6: Final answer
    x = 762.95

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Double scale
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1.5x scale

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.