Home / 651,100.20-976,650.30-399,157.80

Finding the Fourth Proportional to 651,100.20, 976,650.30 and 399,157.80

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Solution

The fourth proportional to 651,100.20, 976,650.30 and 399,157.80 is: 598,736.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,100.20 : 976,650.30 = 399,157.80 : x
  2. Step 2: Convert to fraction form
    651,100.20/976,650.30 = 399,157.80/x
  3. Step 3: Cross multiply
    651,100.20x = 976,650.30 × 399,157.80
  4. Step 4: Simplify right side
    651,100.20x = 389,837,585,117.34
  5. Step 5: Solve for x
    x = 389,837,585,117.34/651,100.20
  6. Step 6: Final answer
    x = 598,736.70

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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.