Home / 679,350.40-1,019,025.60-343,427.20

Finding the Fourth Proportional to 679,350.40, 1,019,025.60 and 343,427.20

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Solution

The fourth proportional to 679,350.40, 1,019,025.60 and 343,427.20 is: 515,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,350.40 : 1,019,025.60 = 343,427.20 : x
  2. Step 2: Convert to fraction form
    679,350.40/1,019,025.60 = 343,427.20/x
  3. Step 3: Cross multiply
    679,350.40x = 1,019,025.60 × 343,427.20
  4. Step 4: Simplify right side
    679,350.40x = 349,961,108,536.32
  5. Step 5: Solve for x
    x = 349,961,108,536.32/679,350.40
  6. Step 6: Final answer
    x = 515,140.80

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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.