Home / 1,291.83-1,937.75-317.93

Finding the Fourth Proportional to 1,291.83, 1,937.75 and 317.93

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Solution

The fourth proportional to 1,291.83, 1,937.75 and 317.93 is: 476.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.83 : 1,937.75 = 317.93 : x
  2. Step 2: Convert to fraction form
    1,291.83/1,937.75 = 317.93/x
  3. Step 3: Cross multiply
    1,291.83x = 1,937.75 × 317.93
  4. Step 4: Simplify right side
    1,291.83x = 616,068.86
  5. Step 5: Solve for x
    x = 616,068.86/1,291.83
  6. Step 6: Final answer
    x = 476.90

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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.