Home / 669,072.40-1,003,608.60-385,637.20

Finding the Fourth Proportional to 669,072.40, 1,003,608.60 and 385,637.20

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Solution

The fourth proportional to 669,072.40, 1,003,608.60 and 385,637.20 is: 578,455.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,072.40 : 1,003,608.60 = 385,637.20 : x
  2. Step 2: Convert to fraction form
    669,072.40/1,003,608.60 = 385,637.20/x
  3. Step 3: Cross multiply
    669,072.40x = 1,003,608.60 × 385,637.20
  4. Step 4: Simplify right side
    669,072.40x = 387,028,810,399.92
  5. Step 5: Solve for x
    x = 387,028,810,399.92/669,072.40
  6. Step 6: Final answer
    x = 578,455.80

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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.