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Finding the Fourth Proportional to 587,176.81, 810,308.15 and 318,904.81

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Solution

The fourth proportional to 587,176.81, 810,308.15 and 318,904.81 is: 440,090.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,176.81 : 810,308.15 = 318,904.81 : x
  2. Step 2: Convert to fraction form
    587,176.81/810,308.15 = 318,904.81/x
  3. Step 3: Cross multiply
    587,176.81x = 810,308.15 × 318,904.81
  4. Step 4: Simplify right side
    587,176.81x = 258,411,165,022.68
  5. Step 5: Solve for x
    x = 258,411,165,022.68/587,176.81
  6. Step 6: Final answer
    x = 440,090.89

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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.