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Finding the Fourth Proportional to 613,642.64, 920,036.01 and 271,900.20

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Solution

The fourth proportional to 613,642.64, 920,036.01 and 271,900.20 is: 407,660.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,642.64 : 920,036.01 = 271,900.20 : x
  2. Step 2: Convert to fraction form
    613,642.64/920,036.01 = 271,900.20/x
  3. Step 3: Cross multiply
    613,642.64x = 920,036.01 × 271,900.20
  4. Step 4: Simplify right side
    613,642.64x = 250,157,975,126.20
  5. Step 5: Solve for x
    x = 250,157,975,126.20/613,642.64
  6. Step 6: Final answer
    x = 407,660.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.