Home / 1,278.69-1,918.13-457.04

Finding the Fourth Proportional to 1,278.69, 1,918.13 and 457.04

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Solution

The fourth proportional to 1,278.69, 1,918.13 and 457.04 is: 685.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.69 : 1,918.13 = 457.04 : x
  2. Step 2: Convert to fraction form
    1,278.69/1,918.13 = 457.04/x
  3. Step 3: Cross multiply
    1,278.69x = 1,918.13 × 457.04
  4. Step 4: Simplify right side
    1,278.69x = 876,667.22
  5. Step 5: Solve for x
    x = 876,667.22/1,278.69
  6. Step 6: Final answer
    x = 685.60

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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.