Home / 1,279.24-1,918.05-457.36

Finding the Fourth Proportional to 1,279.24, 1,918.05 and 457.36

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Solution

The fourth proportional to 1,279.24, 1,918.05 and 457.36 is: 685.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.24 : 1,918.05 = 457.36 : x
  2. Step 2: Convert to fraction form
    1,279.24/1,918.05 = 457.36/x
  3. Step 3: Cross multiply
    1,279.24x = 1,918.05 × 457.36
  4. Step 4: Simplify right side
    1,279.24x = 877,239.35
  5. Step 5: Solve for x
    x = 877,239.35/1,279.24
  6. Step 6: Final answer
    x = 685.75

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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.