Home / 810,126.80-1,215,190.20-389,301.20

Finding the Fourth Proportional to 810,126.80, 1,215,190.20 and 389,301.20

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Solution

The fourth proportional to 810,126.80, 1,215,190.20 and 389,301.20 is: 583,951.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,126.80 : 1,215,190.20 = 389,301.20 : x
  2. Step 2: Convert to fraction form
    810,126.80/1,215,190.20 = 389,301.20/x
  3. Step 3: Cross multiply
    810,126.80x = 1,215,190.20 × 389,301.20
  4. Step 4: Simplify right side
    810,126.80x = 473,075,003,088.24
  5. Step 5: Solve for x
    x = 473,075,003,088.24/810,126.80
  6. Step 6: Final answer
    x = 583,951.80

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Double scale
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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.