Home / 628,009.20-942,013.80-313,081.20

Finding the Fourth Proportional to 628,009.20, 942,013.80 and 313,081.20

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Solution

The fourth proportional to 628,009.20, 942,013.80 and 313,081.20 is: 469,621.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,009.20 : 942,013.80 = 313,081.20 : x
  2. Step 2: Convert to fraction form
    628,009.20/942,013.80 = 313,081.20/x
  3. Step 3: Cross multiply
    628,009.20x = 942,013.80 × 313,081.20
  4. Step 4: Simplify right side
    628,009.20x = 294,926,810,920.56
  5. Step 5: Solve for x
    x = 294,926,810,920.56/628,009.20
  6. Step 6: Final answer
    x = 469,621.80

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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.