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Finding the Fourth Proportional to 505,187.38, 697,108.95 and 278,818.30

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Solution

The fourth proportional to 505,187.38, 697,108.95 and 278,818.30 is: 384,741.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,187.38 : 697,108.95 = 278,818.30 : x
  2. Step 2: Convert to fraction form
    505,187.38/697,108.95 = 278,818.30/x
  3. Step 3: Cross multiply
    505,187.38x = 697,108.95 × 278,818.30
  4. Step 4: Simplify right side
    505,187.38x = 194,366,732,353.79
  5. Step 5: Solve for x
    x = 194,366,732,353.79/505,187.38
  6. Step 6: Final answer
    x = 384,741.86

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1.5x scale

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.