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Finding the Fourth Proportional to 403,395.20, 605,530.20 and 253,804.40

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Solution

The fourth proportional to 403,395.20, 605,530.20 and 253,804.40 is: 380,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,395.20 : 605,530.20 = 253,804.40 : x
  2. Step 2: Convert to fraction form
    403,395.20/605,530.20 = 253,804.40/x
  3. Step 3: Cross multiply
    403,395.20x = 605,530.20 × 253,804.40
  4. Step 4: Simplify right side
    403,395.20x = 153,686,229,092.88
  5. Step 5: Solve for x
    x = 153,686,229,092.88/403,395.20
  6. Step 6: Final answer
    x = 380,981.80

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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.