Home / 1,315.95-1,972.41-493.70

Finding the Fourth Proportional to 1,315.95, 1,972.41 and 493.70

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Solution

The fourth proportional to 1,315.95, 1,972.41 and 493.70 is: 739.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.95 : 1,972.41 = 493.70 : x
  2. Step 2: Convert to fraction form
    1,315.95/1,972.41 = 493.70/x
  3. Step 3: Cross multiply
    1,315.95x = 1,972.41 × 493.70
  4. Step 4: Simplify right side
    1,315.95x = 973,779.59
  5. Step 5: Solve for x
    x = 973,779.59/1,315.95
  6. Step 6: Final answer
    x = 739.98

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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.