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Finding the Fourth Proportional to 621,407.72, 857,534.48 and 349,475.52

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Solution

The fourth proportional to 621,407.72, 857,534.48 and 349,475.52 is: 482,271.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,407.72 : 857,534.48 = 349,475.52 : x
  2. Step 2: Convert to fraction form
    621,407.72/857,534.48 = 349,475.52/x
  3. Step 3: Cross multiply
    621,407.72x = 857,534.48 × 349,475.52
  4. Step 4: Simplify right side
    621,407.72x = 299,687,308,315.93
  5. Step 5: Solve for x
    x = 299,687,308,315.93/621,407.72
  6. Step 6: Final answer
    x = 482,271.62

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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.