Home / 1,308.24-1,962.36-430.83

Finding the Fourth Proportional to 1,308.24, 1,962.36 and 430.83

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Solution

The fourth proportional to 1,308.24, 1,962.36 and 430.83 is: 646.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.24 : 1,962.36 = 430.83 : x
  2. Step 2: Convert to fraction form
    1,308.24/1,962.36 = 430.83/x
  3. Step 3: Cross multiply
    1,308.24x = 1,962.36 × 430.83
  4. Step 4: Simplify right side
    1,308.24x = 845,443.56
  5. Step 5: Solve for x
    x = 845,443.56/1,308.24
  6. Step 6: Final answer
    x = 646.25

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Double scale
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Similar ratio
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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.