Home / 1,312.35-1,968.75-490.60

Finding the Fourth Proportional to 1,312.35, 1,968.75 and 490.60

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Solution

The fourth proportional to 1,312.35, 1,968.75 and 490.60 is: 735.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.35 : 1,968.75 = 490.60 : x
  2. Step 2: Convert to fraction form
    1,312.35/1,968.75 = 490.60/x
  3. Step 3: Cross multiply
    1,312.35x = 1,968.75 × 490.60
  4. Step 4: Simplify right side
    1,312.35x = 965,868.75
  5. Step 5: Solve for x
    x = 965,868.75/1,312.35
  6. Step 6: Final answer
    x = 735.98

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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.