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Finding the Fourth Proportional to 519,894.38, 717,454.30 and 281,430.38

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Solution

The fourth proportional to 519,894.38, 717,454.30 and 281,430.38 is: 388,373.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,894.38 : 717,454.30 = 281,430.38 : x
  2. Step 2: Convert to fraction form
    519,894.38/717,454.30 = 281,430.38/x
  3. Step 3: Cross multiply
    519,894.38x = 717,454.30 × 281,430.38
  4. Step 4: Simplify right side
    519,894.38x = 201,913,436,281.63
  5. Step 5: Solve for x
    x = 201,913,436,281.63/519,894.38
  6. Step 6: Final answer
    x = 388,373.95

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Double scale
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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.