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Finding the Fourth Proportional to 640,314.32, 883,605.06 and 353,828.25

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Solution

The fourth proportional to 640,314.32, 883,605.06 and 353,828.25 is: 488,267.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,314.32 : 883,605.06 = 353,828.25 : x
  2. Step 2: Convert to fraction form
    640,314.32/883,605.06 = 353,828.25/x
  3. Step 3: Cross multiply
    640,314.32x = 883,605.06 × 353,828.25
  4. Step 4: Simplify right side
    640,314.32x = 312,644,432,070.95
  5. Step 5: Solve for x
    x = 312,644,432,070.95/640,314.32
  6. Step 6: Final answer
    x = 488,267.13

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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.