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Finding the Fourth Proportional to 810.21, 1,125.59 and 802.62

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Solution

The fourth proportional to 810.21, 1,125.59 and 802.62 is: 1,115.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.21 : 1,125.59 = 802.62 : x
  2. Step 2: Convert to fraction form
    810.21/1,125.59 = 802.62/x
  3. Step 3: Cross multiply
    810.21x = 1,125.59 × 802.62
  4. Step 4: Simplify right side
    810.21x = 903,423.05
  5. Step 5: Solve for x
    x = 903,423.05/810.21
  6. Step 6: Final answer
    x = 1,115.05

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.