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Finding the Fourth Proportional to 621,683.47, 857,874 and 349,697.23

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Solution

The fourth proportional to 621,683.47, 857,874 and 349,697.23 is: 482,554.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,683.47 : 857,874 = 349,697.23 : x
  2. Step 2: Convert to fraction form
    621,683.47/857,874 = 349,697.23/x
  3. Step 3: Cross multiply
    621,683.47x = 857,874 × 349,697.23
  4. Step 4: Simplify right side
    621,683.47x = 299,996,161,489.02
  5. Step 5: Solve for x
    x = 299,996,161,489.02/621,683.47
  6. Step 6: Final answer
    x = 482,554.51

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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.