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Finding the Fourth Proportional to 621,370.72, 857,483.39 and 349,438.53

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Solution

The fourth proportional to 621,370.72, 857,483.39 and 349,438.53 is: 482,220.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,370.72 : 857,483.39 = 349,438.53 : x
  2. Step 2: Convert to fraction form
    621,370.72/857,483.39 = 349,438.53/x
  3. Step 3: Cross multiply
    621,370.72x = 857,483.39 × 349,438.53
  4. Step 4: Simplify right side
    621,370.72x = 299,637,736,174.61
  5. Step 5: Solve for x
    x = 299,637,736,174.61/621,370.72
  6. Step 6: Final answer
    x = 482,220.56

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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.