Home / 1,317.83-1,977.09-393.35

Finding the Fourth Proportional to 1,317.83, 1,977.09 and 393.35

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Solution

The fourth proportional to 1,317.83, 1,977.09 and 393.35 is: 590.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.83 : 1,977.09 = 393.35 : x
  2. Step 2: Convert to fraction form
    1,317.83/1,977.09 = 393.35/x
  3. Step 3: Cross multiply
    1,317.83x = 1,977.09 × 393.35
  4. Step 4: Simplify right side
    1,317.83x = 777,688.35
  5. Step 5: Solve for x
    x = 777,688.35/1,317.83
  6. Step 6: Final answer
    x = 590.13

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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.