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Finding the Fourth Proportional to 573,057.81, 790,785.05 and 318,400.29

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Solution

The fourth proportional to 573,057.81, 790,785.05 and 318,400.29 is: 439,373.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,057.81 : 790,785.05 = 318,400.29 : x
  2. Step 2: Convert to fraction form
    573,057.81/790,785.05 = 318,400.29/x
  3. Step 3: Cross multiply
    573,057.81x = 790,785.05 × 318,400.29
  4. Step 4: Simplify right side
    573,057.81x = 251,786,187,655.66
  5. Step 5: Solve for x
    x = 251,786,187,655.66/573,057.81
  6. Step 6: Final answer
    x = 439,373.10

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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.