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Finding the Fourth Proportional to 505,289.72, 697,281.54 and 278,930.36

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Solution

The fourth proportional to 505,289.72, 697,281.54 and 278,930.36 is: 384,913.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,289.72 : 697,281.54 = 278,930.36 : x
  2. Step 2: Convert to fraction form
    505,289.72/697,281.54 = 278,930.36/x
  3. Step 3: Cross multiply
    505,289.72x = 697,281.54 × 278,930.36
  4. Step 4: Simplify right side
    505,289.72x = 194,492,990,973.55
  5. Step 5: Solve for x
    x = 194,492,990,973.55/505,289.72
  6. Step 6: Final answer
    x = 384,913.81

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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.