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Finding the Fourth Proportional to 677,830.78, 935,486.31 and 376,044.22

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Solution

The fourth proportional to 677,830.78, 935,486.31 and 376,044.22 is: 518,985.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,830.78 : 935,486.31 = 376,044.22 : x
  2. Step 2: Convert to fraction form
    677,830.78/935,486.31 = 376,044.22/x
  3. Step 3: Cross multiply
    677,830.78x = 935,486.31 × 376,044.22
  4. Step 4: Simplify right side
    677,830.78x = 351,784,219,764.63
  5. Step 5: Solve for x
    x = 351,784,219,764.63/677,830.78
  6. Step 6: Final answer
    x = 518,985.31

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1.5x scale

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.