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Finding the Fourth Proportional to 395,516.12, 545,661.63 and 292,397.90

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Solution

The fourth proportional to 395,516.12, 545,661.63 and 292,397.90 is: 403,397.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,516.12 : 545,661.63 = 292,397.90 : x
  2. Step 2: Convert to fraction form
    395,516.12/545,661.63 = 292,397.90/x
  3. Step 3: Cross multiply
    395,516.12x = 545,661.63 × 292,397.90
  4. Step 4: Simplify right side
    395,516.12x = 159,550,311,994.27
  5. Step 5: Solve for x
    x = 159,550,311,994.27/395,516.12
  6. Step 6: Final answer
    x = 403,397.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.