Home / 1,382.07-2,072.65-457.40

Finding the Fourth Proportional to 1,382.07, 2,072.65 and 457.40

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Solution

The fourth proportional to 1,382.07, 2,072.65 and 457.40 is: 685.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.07 : 2,072.65 = 457.40 : x
  2. Step 2: Convert to fraction form
    1,382.07/2,072.65 = 457.40/x
  3. Step 3: Cross multiply
    1,382.07x = 2,072.65 × 457.40
  4. Step 4: Simplify right side
    1,382.07x = 948,030.11
  5. Step 5: Solve for x
    x = 948,030.11/1,382.07
  6. Step 6: Final answer
    x = 685.95

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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.