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Finding the Fourth Proportional to 667,356.83, 920,955.18 and 361,436.84

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Solution

The fourth proportional to 667,356.83, 920,955.18 and 361,436.84 is: 498,784.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,356.83 : 920,955.18 = 361,436.84 : x
  2. Step 2: Convert to fraction form
    667,356.83/920,955.18 = 361,436.84/x
  3. Step 3: Cross multiply
    667,356.83x = 920,955.18 × 361,436.84
  4. Step 4: Simplify right side
    667,356.83x = 332,867,130,040.83
  5. Step 5: Solve for x
    x = 332,867,130,040.83/667,356.83
  6. Step 6: Final answer
    x = 498,784.33

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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.