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Finding the Fourth Proportional to 1,315.57, 1,973.37 and 341.68

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Solution

The fourth proportional to 1,315.57, 1,973.37 and 341.68 is: 512.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.57 : 1,973.37 = 341.68 : x
  2. Step 2: Convert to fraction form
    1,315.57/1,973.37 = 341.68/x
  3. Step 3: Cross multiply
    1,315.57x = 1,973.37 × 341.68
  4. Step 4: Simplify right side
    1,315.57x = 674,261.06
  5. Step 5: Solve for x
    x = 674,261.06/1,315.57
  6. Step 6: Final answer
    x = 512.52

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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.