Home / 3,390.09-4,678.49-1,897.71

Finding the Fourth Proportional to 3,390.09, 4,678.49 and 1,897.71

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Solution

The fourth proportional to 3,390.09, 4,678.49 and 1,897.71 is: 2,618.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.09 : 4,678.49 = 1,897.71 : x
  2. Step 2: Convert to fraction form
    3,390.09/4,678.49 = 1,897.71/x
  3. Step 3: Cross multiply
    3,390.09x = 4,678.49 × 1,897.71
  4. Step 4: Simplify right side
    3,390.09x = 8,878,420.10
  5. Step 5: Solve for x
    x = 8,878,420.10/3,390.09
  6. Step 6: Final answer
    x = 2,618.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.