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Finding the Fourth Proportional to 291,680.40, 421,755.60 and 291,680.40

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Solution

The fourth proportional to 291,680.40, 421,755.60 and 291,680.40 is: 421,755.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,680.40 : 421,755.60 = 291,680.40 : x
  2. Step 2: Convert to fraction form
    291,680.40/421,755.60 = 291,680.40/x
  3. Step 3: Cross multiply
    291,680.40x = 421,755.60 × 291,680.40
  4. Step 4: Simplify right side
    291,680.40x = 123,017,842,110.24
  5. Step 5: Solve for x
    x = 123,017,842,110.24/291,680.40
  6. Step 6: Final answer
    x = 421,755.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.