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Finding the Fourth Proportional to 2,858.64, 4,287.68 and 912.24

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Solution

The fourth proportional to 2,858.64, 4,287.68 and 912.24 is: 1,368.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.64 : 4,287.68 = 912.24 : x
  2. Step 2: Convert to fraction form
    2,858.64/4,287.68 = 912.24/x
  3. Step 3: Cross multiply
    2,858.64x = 4,287.68 × 912.24
  4. Step 4: Simplify right side
    2,858.64x = 3,911,393.20
  5. Step 5: Solve for x
    x = 3,911,393.20/2,858.64
  6. Step 6: Final answer
    x = 1,368.27

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1.5x scale

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.