Home / 1,431.58-1,975.41-802.14

Finding the Fourth Proportional to 1,431.58, 1,975.41 and 802.14

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Solution

The fourth proportional to 1,431.58, 1,975.41 and 802.14 is: 1,106.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.58 : 1,975.41 = 802.14 : x
  2. Step 2: Convert to fraction form
    1,431.58/1,975.41 = 802.14/x
  3. Step 3: Cross multiply
    1,431.58x = 1,975.41 × 802.14
  4. Step 4: Simplify right side
    1,431.58x = 1,584,555.38
  5. Step 5: Solve for x
    x = 1,584,555.38/1,431.58
  6. Step 6: Final answer
    x = 1,106.86

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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.