Home / 919,401.40-1,379,102.10-288,314.20

Finding the Fourth Proportional to 919,401.40, 1,379,102.10 and 288,314.20

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Solution

The fourth proportional to 919,401.40, 1,379,102.10 and 288,314.20 is: 432,471.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,401.40 : 1,379,102.10 = 288,314.20 : x
  2. Step 2: Convert to fraction form
    919,401.40/1,379,102.10 = 288,314.20/x
  3. Step 3: Cross multiply
    919,401.40x = 1,379,102.10 × 288,314.20
  4. Step 4: Simplify right side
    919,401.40x = 397,614,718,679.82
  5. Step 5: Solve for x
    x = 397,614,718,679.82/919,401.40
  6. Step 6: Final answer
    x = 432,471.30

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Half scale
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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.