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Finding the Fourth Proportional to 656,153.88, 905,492.38 and 354,347.88

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Solution

The fourth proportional to 656,153.88, 905,492.38 and 354,347.88 is: 489,000.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,153.88 : 905,492.38 = 354,347.88 : x
  2. Step 2: Convert to fraction form
    656,153.88/905,492.38 = 354,347.88/x
  3. Step 3: Cross multiply
    656,153.88x = 905,492.38 × 354,347.88
  4. Step 4: Simplify right side
    656,153.88x = 320,859,304,323.29
  5. Step 5: Solve for x
    x = 320,859,304,323.29/656,153.88
  6. Step 6: Final answer
    x = 489,000.09

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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.