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Finding the Fourth Proportional to 504,930.72, 696,806.64 and 278,582.88

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Solution

The fourth proportional to 504,930.72, 696,806.64 and 278,582.88 is: 384,445.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    504,930.72 : 696,806.64 = 278,582.88 : x
  2. Step 2: Convert to fraction form
    504,930.72/696,806.64 = 278,582.88/x
  3. Step 3: Cross multiply
    504,930.72x = 696,806.64 × 278,582.88
  4. Step 4: Simplify right side
    504,930.72x = 194,118,400,574.32
  5. Step 5: Solve for x
    x = 194,118,400,574.32/504,930.72
  6. Step 6: Final answer
    x = 384,445.61

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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.