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Finding the Fourth Proportional to 403,362.40, 605,043.60 and 385,647.70

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Solution

The fourth proportional to 403,362.40, 605,043.60 and 385,647.70 is: 578,471.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,362.40 : 605,043.60 = 385,647.70 : x
  2. Step 2: Convert to fraction form
    403,362.40/605,043.60 = 385,647.70/x
  3. Step 3: Cross multiply
    403,362.40x = 605,043.60 × 385,647.70
  4. Step 4: Simplify right side
    403,362.40x = 233,333,672,739.72
  5. Step 5: Solve for x
    x = 233,333,672,739.72/403,362.40
  6. Step 6: Final answer
    x = 578,471.55

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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.