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Finding the Fourth Proportional to 403,485.40, 605,228.10 and 359,939.80

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Solution

The fourth proportional to 403,485.40, 605,228.10 and 359,939.80 is: 539,909.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,485.40 : 605,228.10 = 359,939.80 : x
  2. Step 2: Convert to fraction form
    403,485.40/605,228.10 = 359,939.80/x
  3. Step 3: Cross multiply
    403,485.40x = 605,228.10 × 359,939.80
  4. Step 4: Simplify right side
    403,485.40x = 217,845,681,268.38
  5. Step 5: Solve for x
    x = 217,845,681,268.38/403,485.40
  6. Step 6: Final answer
    x = 539,909.70

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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.