Home / 1,317.48-1,818.11-719.97

Finding the Fourth Proportional to 1,317.48, 1,818.11 and 719.97

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Solution

The fourth proportional to 1,317.48, 1,818.11 and 719.97 is: 993.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.48 : 1,818.11 = 719.97 : x
  2. Step 2: Convert to fraction form
    1,317.48/1,818.11 = 719.97/x
  3. Step 3: Cross multiply
    1,317.48x = 1,818.11 × 719.97
  4. Step 4: Simplify right side
    1,317.48x = 1,308,981.06
  5. Step 5: Solve for x
    x = 1,308,981.06/1,317.48
  6. Step 6: Final answer
    x = 993.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.