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Finding the Fourth Proportional to 438,459.60, 657,640.80 and 122,948.40

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Solution

The fourth proportional to 438,459.60, 657,640.80 and 122,948.40 is: 184,408.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,459.60 : 657,640.80 = 122,948.40 : x
  2. Step 2: Convert to fraction form
    438,459.60/657,640.80 = 122,948.40/x
  3. Step 3: Cross multiply
    438,459.60x = 657,640.80 × 122,948.40
  4. Step 4: Simplify right side
    438,459.60x = 80,855,884,134.72
  5. Step 5: Solve for x
    x = 80,855,884,134.72/438,459.60
  6. Step 6: Final answer
    x = 184,408.97

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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.