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Finding the Fourth Proportional to 571,068.90, 787,780.29 and 387,245.31

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Solution

The fourth proportional to 571,068.90, 787,780.29 and 387,245.31 is: 534,198.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,068.90 : 787,780.29 = 387,245.31 : x
  2. Step 2: Convert to fraction form
    571,068.90/787,780.29 = 387,245.31/x
  3. Step 3: Cross multiply
    571,068.90x = 787,780.29 × 387,245.31
  4. Step 4: Simplify right side
    571,068.90x = 305,064,222,612.94
  5. Step 5: Solve for x
    x = 305,064,222,612.94/571,068.90
  6. Step 6: Final answer
    x = 534,198.63

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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.