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Finding the Fourth Proportional to 572,771.84, 790,403.28 and 318,139.36

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Solution

The fourth proportional to 572,771.84, 790,403.28 and 318,139.36 is: 439,020.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,771.84 : 790,403.28 = 318,139.36 : x
  2. Step 2: Convert to fraction form
    572,771.84/790,403.28 = 318,139.36/x
  3. Step 3: Cross multiply
    572,771.84x = 790,403.28 × 318,139.36
  4. Step 4: Simplify right side
    572,771.84x = 251,458,393,641.10
  5. Step 5: Solve for x
    x = 251,458,393,641.10/572,771.84
  6. Step 6: Final answer
    x = 439,020.18

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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.