Home / 1,531.04-2,112.93-858.89

Finding the Fourth Proportional to 1,531.04, 2,112.93 and 858.89

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Solution

The fourth proportional to 1,531.04, 2,112.93 and 858.89 is: 1,185.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.04 : 2,112.93 = 858.89 : x
  2. Step 2: Convert to fraction form
    1,531.04/2,112.93 = 858.89/x
  3. Step 3: Cross multiply
    1,531.04x = 2,112.93 × 858.89
  4. Step 4: Simplify right side
    1,531.04x = 1,814,763.88
  5. Step 5: Solve for x
    x = 1,814,763.88/1,531.04
  6. Step 6: Final answer
    x = 1,185.32

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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.