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Finding the Fourth Proportional to 587,607.12, 811,145.64 and 396,878.88

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Solution

The fourth proportional to 587,607.12, 811,145.64 and 396,878.88 is: 547,860.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,607.12 : 811,145.64 = 396,878.88 : x
  2. Step 2: Convert to fraction form
    587,607.12/811,145.64 = 396,878.88/x
  3. Step 3: Cross multiply
    587,607.12x = 811,145.64 × 396,878.88
  4. Step 4: Simplify right side
    587,607.12x = 321,926,573,120.08
  5. Step 5: Solve for x
    x = 321,926,573,120.08/587,607.12
  6. Step 6: Final answer
    x = 547,860.23

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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.