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Finding the Fourth Proportional to 621,581.98, 857,859 and 349,661.32

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Solution

The fourth proportional to 621,581.98, 857,859 and 349,661.32 is: 482,575.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,581.98 : 857,859 = 349,661.32 : x
  2. Step 2: Convert to fraction form
    621,581.98/857,859 = 349,661.32/x
  3. Step 3: Cross multiply
    621,581.98x = 857,859 × 349,661.32
  4. Step 4: Simplify right side
    621,581.98x = 299,960,110,313.88
  5. Step 5: Solve for x
    x = 299,960,110,313.88/621,581.98
  6. Step 6: Final answer
    x = 482,575.30

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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.