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Finding the Fourth Proportional to 456,891.40, 683,781.90 and 400,904.20

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Solution

The fourth proportional to 456,891.40, 683,781.90 and 400,904.20 is: 599,991.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,891.40 : 683,781.90 = 400,904.20 : x
  2. Step 2: Convert to fraction form
    456,891.40/683,781.90 = 400,904.20/x
  3. Step 3: Cross multiply
    456,891.40x = 683,781.90 × 400,904.20
  4. Step 4: Simplify right side
    456,891.40x = 274,131,035,593.98
  5. Step 5: Solve for x
    x = 274,131,035,593.98/456,891.40
  6. Step 6: Final answer
    x = 599,991.67

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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.