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Finding the Fourth Proportional to 573,078.60, 790,813.80 and 318,421.08

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Solution

The fourth proportional to 573,078.60, 790,813.80 and 318,421.08 is: 439,401.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,078.60 : 790,813.80 = 318,421.08 : x
  2. Step 2: Convert to fraction form
    573,078.60/790,813.80 = 318,421.08/x
  3. Step 3: Cross multiply
    573,078.60x = 790,813.80 × 318,421.08
  4. Step 4: Simplify right side
    573,078.60x = 251,811,784,274.90
  5. Step 5: Solve for x
    x = 251,811,784,274.90/573,078.60
  6. Step 6: Final answer
    x = 439,401.83

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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.