Home / 919,343.78-1,379,015.67-288,306.80

Finding the Fourth Proportional to 919,343.78, 1,379,015.67 and 288,306.80

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Solution

The fourth proportional to 919,343.78, 1,379,015.67 and 288,306.80 is: 432,460.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,343.78 : 1,379,015.67 = 288,306.80 : x
  2. Step 2: Convert to fraction form
    919,343.78/1,379,015.67 = 288,306.80/x
  3. Step 3: Cross multiply
    919,343.78x = 1,379,015.67 × 288,306.80
  4. Step 4: Simplify right side
    919,343.78x = 397,579,594,967.56
  5. Step 5: Solve for x
    x = 397,579,594,967.56/919,343.78
  6. Step 6: Final answer
    x = 432,460.20

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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.