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Finding the Fourth Proportional to 1,440.36, 1,987.67 and 802.29

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Solution

The fourth proportional to 1,440.36, 1,987.67 and 802.29 is: 1,107.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.36 : 1,987.67 = 802.29 : x
  2. Step 2: Convert to fraction form
    1,440.36/1,987.67 = 802.29/x
  3. Step 3: Cross multiply
    1,440.36x = 1,987.67 × 802.29
  4. Step 4: Simplify right side
    1,440.36x = 1,594,683.75
  5. Step 5: Solve for x
    x = 1,594,683.75/1,440.36
  6. Step 6: Final answer
    x = 1,107.14

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1.5x scale

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.