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Finding the Fourth Proportional to 403,402.80, 605,039.40 and 122,854.80

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Solution

The fourth proportional to 403,402.80, 605,039.40 and 122,854.80 is: 184,262.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,402.80 : 605,039.40 = 122,854.80 : x
  2. Step 2: Convert to fraction form
    403,402.80/605,039.40 = 122,854.80/x
  3. Step 3: Cross multiply
    403,402.80x = 605,039.40 × 122,854.80
  4. Step 4: Simplify right side
    403,402.80x = 74,331,994,479.12
  5. Step 5: Solve for x
    x = 74,331,994,479.12/403,402.80
  6. Step 6: Final answer
    x = 184,262.47

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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.