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Finding the Fourth Proportional to 1,680, 2,518.91 and 802.02

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Solution

The fourth proportional to 1,680, 2,518.91 and 802.02 is: 1,202.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680 : 2,518.91 = 802.02 : x
  2. Step 2: Convert to fraction form
    1,680/2,518.91 = 802.02/x
  3. Step 3: Cross multiply
    1,680x = 2,518.91 × 802.02
  4. Step 4: Simplify right side
    1,680x = 2,020,216.20
  5. Step 5: Solve for x
    x = 2,020,216.20/1,680
  6. Step 6: Final answer
    x = 1,202.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.