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Finding the Fourth Proportional to 573,139.64, 790,903.80 and 318,485.36

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Solution

The fourth proportional to 573,139.64, 790,903.80 and 318,485.36 is: 439,493.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,139.64 : 790,903.80 = 318,485.36 : x
  2. Step 2: Convert to fraction form
    573,139.64/790,903.80 = 318,485.36/x
  3. Step 3: Cross multiply
    573,139.64x = 790,903.80 × 318,485.36
  4. Step 4: Simplify right side
    573,139.64x = 251,891,277,513.85
  5. Step 5: Solve for x
    x = 251,891,277,513.85/573,139.64
  6. Step 6: Final answer
    x = 439,493.73

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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.