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Finding the Fourth Proportional to 666,969.66, 920,416.23 and 365,161.50

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Solution

The fourth proportional to 666,969.66, 920,416.23 and 365,161.50 is: 503,921.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,969.66 : 920,416.23 = 365,161.50 : x
  2. Step 2: Convert to fraction form
    666,969.66/920,416.23 = 365,161.50/x
  3. Step 3: Cross multiply
    666,969.66x = 920,416.23 × 365,161.50
  4. Step 4: Simplify right side
    666,969.66x = 336,100,571,171.15
  5. Step 5: Solve for x
    x = 336,100,571,171.15/666,969.66
  6. Step 6: Final answer
    x = 503,921.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.