Home / 2,420.83-3,340.69-1,358.65

Finding the Fourth Proportional to 2,420.83, 3,340.69 and 1,358.65

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Solution

The fourth proportional to 2,420.83, 3,340.69 and 1,358.65 is: 1,874.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.83 : 3,340.69 = 1,358.65 : x
  2. Step 2: Convert to fraction form
    2,420.83/3,340.69 = 1,358.65/x
  3. Step 3: Cross multiply
    2,420.83x = 3,340.69 × 1,358.65
  4. Step 4: Simplify right side
    2,420.83x = 4,538,828.47
  5. Step 5: Solve for x
    x = 4,538,828.47/2,420.83
  6. Step 6: Final answer
    x = 1,874.91

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Half scale
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Double scale
Find fourth proportional to 2,421.83, 3,342.07 and 1,359.65
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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.