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Finding the Fourth Proportional to 621,346.63, 857,358.32 and 349,398.31

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Solution

The fourth proportional to 621,346.63, 857,358.32 and 349,398.31 is: 482,113.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,346.63 : 857,358.32 = 349,398.31 : x
  2. Step 2: Convert to fraction form
    621,346.63/857,358.32 = 349,398.31/x
  3. Step 3: Cross multiply
    621,346.63x = 857,358.32 × 349,398.31
  4. Step 4: Simplify right side
    621,346.63x = 299,559,548,072.44
  5. Step 5: Solve for x
    x = 299,559,548,072.44/621,346.63
  6. Step 6: Final answer
    x = 482,113.42

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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.