Home / 1,315.90-1,973.78-450.20

Finding the Fourth Proportional to 1,315.90, 1,973.78 and 450.20

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Solution

The fourth proportional to 1,315.90, 1,973.78 and 450.20 is: 675.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.90 : 1,973.78 = 450.20 : x
  2. Step 2: Convert to fraction form
    1,315.90/1,973.78 = 450.20/x
  3. Step 3: Cross multiply
    1,315.90x = 1,973.78 × 450.20
  4. Step 4: Simplify right side
    1,315.90x = 888,595.76
  5. Step 5: Solve for x
    x = 888,595.76/1,315.90
  6. Step 6: Final answer
    x = 675.28

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1.5x scale

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.