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Finding the Fourth Proportional to 802.10, 1,106.65 and 775.67

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Solution

The fourth proportional to 802.10, 1,106.65 and 775.67 is: 1,070.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.10 : 1,106.65 = 775.67 : x
  2. Step 2: Convert to fraction form
    802.10/1,106.65 = 775.67/x
  3. Step 3: Cross multiply
    802.10x = 1,106.65 × 775.67
  4. Step 4: Simplify right side
    802.10x = 858,395.21
  5. Step 5: Solve for x
    x = 858,395.21/802.10
  6. Step 6: Final answer
    x = 1,070.19

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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.