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Finding the Fourth Proportional to 640,153.58, 883,421.23 and 353,680.27

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Solution

The fourth proportional to 640,153.58, 883,421.23 and 353,680.27 is: 488,083.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,153.58 : 883,421.23 = 353,680.27 : x
  2. Step 2: Convert to fraction form
    640,153.58/883,421.23 = 353,680.27/x
  3. Step 3: Cross multiply
    640,153.58x = 883,421.23 × 353,680.27
  4. Step 4: Simplify right side
    640,153.58x = 312,448,653,848.83
  5. Step 5: Solve for x
    x = 312,448,653,848.83/640,153.58
  6. Step 6: Final answer
    x = 488,083.90

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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.