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Finding the Fourth Proportional to 879,536.76, 1,213,763.07 and 477,128.76

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Solution

The fourth proportional to 879,536.76, 1,213,763.07 and 477,128.76 is: 658,438.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,536.76 : 1,213,763.07 = 477,128.76 : x
  2. Step 2: Convert to fraction form
    879,536.76/1,213,763.07 = 477,128.76/x
  3. Step 3: Cross multiply
    879,536.76x = 1,213,763.07 × 477,128.76
  4. Step 4: Simplify right side
    879,536.76x = 579,121,268,522.89
  5. Step 5: Solve for x
    x = 579,121,268,522.89/879,536.76
  6. Step 6: Final answer
    x = 658,438.96

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Half scale
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Double scale
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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.