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Finding the Fourth Proportional to 621,421.24, 857,553.13 and 349,489.03

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Solution

The fourth proportional to 621,421.24, 857,553.13 and 349,489.03 is: 482,290.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,421.24 : 857,553.13 = 349,489.03 : x
  2. Step 2: Convert to fraction form
    621,421.24/857,553.13 = 349,489.03/x
  3. Step 3: Cross multiply
    621,421.24x = 857,553.13 × 349,489.03
  4. Step 4: Simplify right side
    621,421.24x = 299,705,411,577.16
  5. Step 5: Solve for x
    x = 299,705,411,577.16/621,421.24
  6. Step 6: Final answer
    x = 482,290.26

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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.