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Finding the Fourth Proportional to 691,068.70, 953,636.25 and 380,961.28

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Solution

The fourth proportional to 691,068.70, 953,636.25 and 380,961.28 is: 525,705.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,068.70 : 953,636.25 = 380,961.28 : x
  2. Step 2: Convert to fraction form
    691,068.70/953,636.25 = 380,961.28/x
  3. Step 3: Cross multiply
    691,068.70x = 953,636.25 × 380,961.28
  4. Step 4: Simplify right side
    691,068.70x = 363,298,486,454.40
  5. Step 5: Solve for x
    x = 363,298,486,454.40/691,068.70
  6. Step 6: Final answer
    x = 525,705.31

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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.