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Finding the Fourth Proportional to 228,480.40, 342,455.64 and 135,064.72

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Solution

The fourth proportional to 228,480.40, 342,455.64 and 135,064.72 is: 202,440.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,480.40 : 342,455.64 = 135,064.72 : x
  2. Step 2: Convert to fraction form
    228,480.40/342,455.64 = 135,064.72/x
  3. Step 3: Cross multiply
    228,480.40x = 342,455.64 × 135,064.72
  4. Step 4: Simplify right side
    228,480.40x = 46,253,675,129.02
  5. Step 5: Solve for x
    x = 46,253,675,129.02/228,480.40
  6. Step 6: Final answer
    x = 202,440.45

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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.