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Finding the Fourth Proportional to 699,505, 965,316.90 and 381,553

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Solution

The fourth proportional to 699,505, 965,316.90 and 381,553 is: 526,543.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,505 : 965,316.90 = 381,553 : x
  2. Step 2: Convert to fraction form
    699,505/965,316.90 = 381,553/x
  3. Step 3: Cross multiply
    699,505x = 965,316.90 × 381,553
  4. Step 4: Simplify right side
    699,505x = 368,319,559,145.70
  5. Step 5: Solve for x
    x = 368,319,559,145.70/699,505
  6. Step 6: Final answer
    x = 526,543.14

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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.