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Finding the Fourth Proportional to 630,845.98, 870,556.21 and 358,908.02

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Solution

The fourth proportional to 630,845.98, 870,556.21 and 358,908.02 is: 495,286.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,845.98 : 870,556.21 = 358,908.02 : x
  2. Step 2: Convert to fraction form
    630,845.98/870,556.21 = 358,908.02/x
  3. Step 3: Cross multiply
    630,845.98x = 870,556.21 × 358,908.02
  4. Step 4: Simplify right side
    630,845.98x = 312,449,601,277.02
  5. Step 5: Solve for x
    x = 312,449,601,277.02/630,845.98
  6. Step 6: Final answer
    x = 495,286.67

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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.