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Finding the Fourth Proportional to 403,359.40, 605,039.10 and 122,840.20

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Solution

The fourth proportional to 403,359.40, 605,039.10 and 122,840.20 is: 184,260.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,359.40 : 605,039.10 = 122,840.20 : x
  2. Step 2: Convert to fraction form
    403,359.40/605,039.10 = 122,840.20/x
  3. Step 3: Cross multiply
    403,359.40x = 605,039.10 × 122,840.20
  4. Step 4: Simplify right side
    403,359.40x = 74,323,124,051.82
  5. Step 5: Solve for x
    x = 74,323,124,051.82/403,359.40
  6. Step 6: Final answer
    x = 184,260.30

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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.