Home / 919,073.80-1,378,610.70-279,376.30

Finding the Fourth Proportional to 919,073.80, 1,378,610.70 and 279,376.30

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Solution

The fourth proportional to 919,073.80, 1,378,610.70 and 279,376.30 is: 419,064.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,073.80 : 1,378,610.70 = 279,376.30 : x
  2. Step 2: Convert to fraction form
    919,073.80/1,378,610.70 = 279,376.30/x
  3. Step 3: Cross multiply
    919,073.80x = 1,378,610.70 × 279,376.30
  4. Step 4: Simplify right side
    919,073.80x = 385,151,156,506.41
  5. Step 5: Solve for x
    x = 385,151,156,506.41/919,073.80
  6. Step 6: Final answer
    x = 419,064.45

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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.