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Finding the Fourth Proportional to 621,632.58, 857,851.70 and 349,700.66

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Solution

The fourth proportional to 621,632.58, 857,851.70 and 349,700.66 is: 482,586.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,632.58 : 857,851.70 = 349,700.66 : x
  2. Step 2: Convert to fraction form
    621,632.58/857,851.70 = 349,700.66/x
  3. Step 3: Cross multiply
    621,632.58x = 857,851.70 × 349,700.66
  4. Step 4: Simplify right side
    621,632.58x = 299,991,302,851.30
  5. Step 5: Solve for x
    x = 299,991,302,851.30/621,632.58
  6. Step 6: Final answer
    x = 482,586.20

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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.