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Finding the Fourth Proportional to 519,078.30, 778,836.15 and 282,590.70

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Solution

The fourth proportional to 519,078.30, 778,836.15 and 282,590.70 is: 424,005.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,078.30 : 778,836.15 = 282,590.70 : x
  2. Step 2: Convert to fraction form
    519,078.30/778,836.15 = 282,590.70/x
  3. Step 3: Cross multiply
    519,078.30x = 778,836.15 × 282,590.70
  4. Step 4: Simplify right side
    519,078.30x = 220,091,852,813.81
  5. Step 5: Solve for x
    x = 220,091,852,813.81/519,078.30
  6. Step 6: Final answer
    x = 424,005.11

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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.