Home / 685,998.40-1,029,580.80-307,501.60

Finding the Fourth Proportional to 685,998.40, 1,029,580.80 and 307,501.60

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Solution

The fourth proportional to 685,998.40, 1,029,580.80 and 307,501.60 is: 461,513.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,998.40 : 1,029,580.80 = 307,501.60 : x
  2. Step 2: Convert to fraction form
    685,998.40/1,029,580.80 = 307,501.60/x
  3. Step 3: Cross multiply
    685,998.40x = 1,029,580.80 × 307,501.60
  4. Step 4: Simplify right side
    685,998.40x = 316,597,743,329.28
  5. Step 5: Solve for x
    x = 316,597,743,329.28/685,998.40
  6. Step 6: Final answer
    x = 461,513.82

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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.