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Finding the Fourth Proportional to 403,729.80, 605,594.70 and 395,435.40

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Solution

The fourth proportional to 403,729.80, 605,594.70 and 395,435.40 is: 593,153.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,729.80 : 605,594.70 = 395,435.40 : x
  2. Step 2: Convert to fraction form
    403,729.80/605,594.70 = 395,435.40/x
  3. Step 3: Cross multiply
    403,729.80x = 605,594.70 × 395,435.40
  4. Step 4: Simplify right side
    403,729.80x = 239,473,582,432.38
  5. Step 5: Solve for x
    x = 239,473,582,432.38/403,729.80
  6. Step 6: Final answer
    x = 593,153.10

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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.