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Finding the Fourth Proportional to 573,076.68, 790,830.18 and 318,421.32

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Solution

The fourth proportional to 573,076.68, 790,830.18 and 318,421.32 is: 439,412.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,076.68 : 790,830.18 = 318,421.32 : x
  2. Step 2: Convert to fraction form
    573,076.68/790,830.18 = 318,421.32/x
  3. Step 3: Cross multiply
    573,076.68x = 790,830.18 × 318,421.32
  4. Step 4: Simplify right side
    573,076.68x = 251,817,189,811.44
  5. Step 5: Solve for x
    x = 251,817,189,811.44/573,076.68
  6. Step 6: Final answer
    x = 439,412.73

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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.