Home / 1,308.32-1,962.65-430.91

Finding the Fourth Proportional to 1,308.32, 1,962.65 and 430.91

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Solution

The fourth proportional to 1,308.32, 1,962.65 and 430.91 is: 646.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.32 : 1,962.65 = 430.91 : x
  2. Step 2: Convert to fraction form
    1,308.32/1,962.65 = 430.91/x
  3. Step 3: Cross multiply
    1,308.32x = 1,962.65 × 430.91
  4. Step 4: Simplify right side
    1,308.32x = 845,725.08
  5. Step 5: Solve for x
    x = 845,725.08/1,308.32
  6. Step 6: Final answer
    x = 646.42

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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.