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Finding the Fourth Proportional to 1,418.74, 2,130.12 and 802.30

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Solution

The fourth proportional to 1,418.74, 2,130.12 and 802.30 is: 1,204.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.74 : 2,130.12 = 802.30 : x
  2. Step 2: Convert to fraction form
    1,418.74/2,130.12 = 802.30/x
  3. Step 3: Cross multiply
    1,418.74x = 2,130.12 × 802.30
  4. Step 4: Simplify right side
    1,418.74x = 1,708,995.28
  5. Step 5: Solve for x
    x = 1,708,995.28/1,418.74
  6. Step 6: Final answer
    x = 1,204.59

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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.