Home / 685,642.40-1,029,046.80-307,145.60

Finding the Fourth Proportional to 685,642.40, 1,029,046.80 and 307,145.60

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Solution

The fourth proportional to 685,642.40, 1,029,046.80 and 307,145.60 is: 460,979.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,642.40 : 1,029,046.80 = 307,145.60 : x
  2. Step 2: Convert to fraction form
    685,642.40/1,029,046.80 = 307,145.60/x
  3. Step 3: Cross multiply
    685,642.40x = 1,029,046.80 × 307,145.60
  4. Step 4: Simplify right side
    685,642.40x = 316,067,196,814.08
  5. Step 5: Solve for x
    x = 316,067,196,814.08/685,642.40
  6. Step 6: Final answer
    x = 460,979.65

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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.