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Finding the Fourth Proportional to 641,405.24, 885,147.10 and 354,951.98

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Solution

The fourth proportional to 641,405.24, 885,147.10 and 354,951.98 is: 489,838.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,405.24 : 885,147.10 = 354,951.98 : x
  2. Step 2: Convert to fraction form
    641,405.24/885,147.10 = 354,951.98/x
  3. Step 3: Cross multiply
    641,405.24x = 885,147.10 × 354,951.98
  4. Step 4: Simplify right side
    641,405.24x = 314,184,710,423.14
  5. Step 5: Solve for x
    x = 314,184,710,423.14/641,405.24
  6. Step 6: Final answer
    x = 489,838.08

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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.