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Finding the Fourth Proportional to 390,345.72, 585,518.58 and 94,857.72

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Solution

The fourth proportional to 390,345.72, 585,518.58 and 94,857.72 is: 142,286.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,345.72 : 585,518.58 = 94,857.72 : x
  2. Step 2: Convert to fraction form
    390,345.72/585,518.58 = 94,857.72/x
  3. Step 3: Cross multiply
    390,345.72x = 585,518.58 × 94,857.72
  4. Step 4: Simplify right side
    390,345.72x = 55,540,957,516.44
  5. Step 5: Solve for x
    x = 55,540,957,516.44/390,345.72
  6. Step 6: Final answer
    x = 142,286.58

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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.