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Finding the Fourth Proportional to 2,445.65, 3,668.70 and 802.20

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Solution

The fourth proportional to 2,445.65, 3,668.70 and 802.20 is: 1,203.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,445.65 : 3,668.70 = 802.20 : x
  2. Step 2: Convert to fraction form
    2,445.65/3,668.70 = 802.20/x
  3. Step 3: Cross multiply
    2,445.65x = 3,668.70 × 802.20
  4. Step 4: Simplify right side
    2,445.65x = 2,943,031.14
  5. Step 5: Solve for x
    x = 2,943,031.14/2,445.65
  6. Step 6: Final answer
    x = 1,203.38

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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.