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Finding the Fourth Proportional to 851,873.20, 1,277,809.80 and 783,060.40

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Solution

The fourth proportional to 851,873.20, 1,277,809.80 and 783,060.40 is: 1,174,590.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,873.20 : 1,277,809.80 = 783,060.40 : x
  2. Step 2: Convert to fraction form
    851,873.20/1,277,809.80 = 783,060.40/x
  3. Step 3: Cross multiply
    851,873.20x = 1,277,809.80 × 783,060.40
  4. Step 4: Simplify right side
    851,873.20x = 1,000,602,253,111.92
  5. Step 5: Solve for x
    x = 1,000,602,253,111.92/851,873.20
  6. Step 6: Final answer
    x = 1,174,590.60

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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.