Home / 1,405.20-2,106.06-624.30

Finding the Fourth Proportional to 1,405.20, 2,106.06 and 624.30

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Solution

The fourth proportional to 1,405.20, 2,106.06 and 624.30 is: 935.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.20 : 2,106.06 = 624.30 : x
  2. Step 2: Convert to fraction form
    1,405.20/2,106.06 = 624.30/x
  3. Step 3: Cross multiply
    1,405.20x = 2,106.06 × 624.30
  4. Step 4: Simplify right side
    1,405.20x = 1,314,813.26
  5. Step 5: Solve for x
    x = 1,314,813.26/1,405.20
  6. Step 6: Final answer
    x = 935.68

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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.