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Finding the Fourth Proportional to 283,626.88, 391,407.68 and 156,307.04

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Solution

The fourth proportional to 283,626.88, 391,407.68 and 156,307.04 is: 215,705.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,626.88 : 391,407.68 = 156,307.04 : x
  2. Step 2: Convert to fraction form
    283,626.88/391,407.68 = 156,307.04/x
  3. Step 3: Cross multiply
    283,626.88x = 391,407.68 × 156,307.04
  4. Step 4: Simplify right side
    283,626.88x = 61,179,775,894.07
  5. Step 5: Solve for x
    x = 61,179,775,894.07/283,626.88
  6. Step 6: Final answer
    x = 215,705.14

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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.