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Finding the Fourth Proportional to 666,823.89, 920,215.88 and 360,900.09

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Solution

The fourth proportional to 666,823.89, 920,215.88 and 360,900.09 is: 498,041.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,823.89 : 920,215.88 = 360,900.09 : x
  2. Step 2: Convert to fraction form
    666,823.89/920,215.88 = 360,900.09/x
  3. Step 3: Cross multiply
    666,823.89x = 920,215.88 × 360,900.09
  4. Step 4: Simplify right side
    666,823.89x = 332,105,991,362.87
  5. Step 5: Solve for x
    x = 332,105,991,362.87/666,823.89
  6. Step 6: Final answer
    x = 498,041.53

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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.