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Finding the Fourth Proportional to 403,328.40, 604,992.60 and 122,809.20

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Solution

The fourth proportional to 403,328.40, 604,992.60 and 122,809.20 is: 184,213.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,328.40 : 604,992.60 = 122,809.20 : x
  2. Step 2: Convert to fraction form
    403,328.40/604,992.60 = 122,809.20/x
  3. Step 3: Cross multiply
    403,328.40x = 604,992.60 × 122,809.20
  4. Step 4: Simplify right side
    403,328.40x = 74,298,657,211.92
  5. Step 5: Solve for x
    x = 74,298,657,211.92/403,328.40
  6. Step 6: Final answer
    x = 184,213.80

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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.