Home / 670,638.80-1,005,958.20-513,174.80

Finding the Fourth Proportional to 670,638.80, 1,005,958.20 and 513,174.80

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Solution

The fourth proportional to 670,638.80, 1,005,958.20 and 513,174.80 is: 769,762.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,638.80 : 1,005,958.20 = 513,174.80 : x
  2. Step 2: Convert to fraction form
    670,638.80/1,005,958.20 = 513,174.80/x
  3. Step 3: Cross multiply
    670,638.80x = 1,005,958.20 × 513,174.80
  4. Step 4: Simplify right side
    670,638.80x = 516,232,398,093.36
  5. Step 5: Solve for x
    x = 516,232,398,093.36/670,638.80
  6. Step 6: Final answer
    x = 769,762.20

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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.