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Finding the Fourth Proportional to 403,708.80, 605,417.40 and 203,962.80

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Solution

The fourth proportional to 403,708.80, 605,417.40 and 203,962.80 is: 305,870.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,708.80 : 605,417.40 = 203,962.80 : x
  2. Step 2: Convert to fraction form
    403,708.80/605,417.40 = 203,962.80/x
  3. Step 3: Cross multiply
    403,708.80x = 605,417.40 × 203,962.80
  4. Step 4: Simplify right side
    403,708.80x = 123,482,628,072.72
  5. Step 5: Solve for x
    x = 123,482,628,072.72/403,708.80
  6. Step 6: Final answer
    x = 305,870.54

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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.