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Finding the Fourth Proportional to 1,525.40, 2,105.30 and 862.32

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Solution

The fourth proportional to 1,525.40, 2,105.30 and 862.32 is: 1,190.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,525.40 : 2,105.30 = 862.32 : x
  2. Step 2: Convert to fraction form
    1,525.40/2,105.30 = 862.32/x
  3. Step 3: Cross multiply
    1,525.40x = 2,105.30 × 862.32
  4. Step 4: Simplify right side
    1,525.40x = 1,815,442.30
  5. Step 5: Solve for x
    x = 1,815,442.30/1,525.40
  6. Step 6: Final answer
    x = 1,190.14

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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.