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Finding the Fourth Proportional to 621,374.82, 857,489.10 and 349,442.64

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Solution

The fourth proportional to 621,374.82, 857,489.10 and 349,442.64 is: 482,226.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,374.82 : 857,489.10 = 349,442.64 : x
  2. Step 2: Convert to fraction form
    621,374.82/857,489.10 = 349,442.64/x
  3. Step 3: Cross multiply
    621,374.82x = 857,489.10 × 349,442.64
  4. Step 4: Simplify right side
    621,374.82x = 299,643,254,875.22
  5. Step 5: Solve for x
    x = 299,643,254,875.22/621,374.82
  6. Step 6: Final answer
    x = 482,226.26

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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.