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Finding the Fourth Proportional to 403,430.40, 605,145.60 and 359,884.80

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Solution

The fourth proportional to 403,430.40, 605,145.60 and 359,884.80 is: 539,827.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,430.40 : 605,145.60 = 359,884.80 : x
  2. Step 2: Convert to fraction form
    403,430.40/605,145.60 = 359,884.80/x
  3. Step 3: Cross multiply
    403,430.40x = 605,145.60 × 359,884.80
  4. Step 4: Simplify right side
    403,430.40x = 217,782,703,226.88
  5. Step 5: Solve for x
    x = 217,782,703,226.88/403,430.40
  6. Step 6: Final answer
    x = 539,827.20

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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.