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Finding the Fourth Proportional to 573,447.12, 791,312.20 and 318,782.80

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Solution

The fourth proportional to 573,447.12, 791,312.20 and 318,782.80 is: 439,895.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,447.12 : 791,312.20 = 318,782.80 : x
  2. Step 2: Convert to fraction form
    573,447.12/791,312.20 = 318,782.80/x
  3. Step 3: Cross multiply
    573,447.12x = 791,312.20 × 318,782.80
  4. Step 4: Simplify right side
    573,447.12x = 252,256,718,790.16
  5. Step 5: Solve for x
    x = 252,256,718,790.16/573,447.12
  6. Step 6: Final answer
    x = 439,895.35

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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.