Home / 1,412.48-2,118.63-438.50

Finding the Fourth Proportional to 1,412.48, 2,118.63 and 438.50

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Solution

The fourth proportional to 1,412.48, 2,118.63 and 438.50 is: 657.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.48 : 2,118.63 = 438.50 : x
  2. Step 2: Convert to fraction form
    1,412.48/2,118.63 = 438.50/x
  3. Step 3: Cross multiply
    1,412.48x = 2,118.63 × 438.50
  4. Step 4: Simplify right side
    1,412.48x = 929,019.26
  5. Step 5: Solve for x
    x = 929,019.26/1,412.48
  6. Step 6: Final answer
    x = 657.72

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Double scale
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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.