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Finding the Fourth Proportional to 621,404.70, 857,530.34 and 349,472.52

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Solution

The fourth proportional to 621,404.70, 857,530.34 and 349,472.52 is: 482,267.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,404.70 : 857,530.34 = 349,472.52 : x
  2. Step 2: Convert to fraction form
    621,404.70/857,530.34 = 349,472.52/x
  3. Step 3: Cross multiply
    621,404.70x = 857,530.34 × 349,472.52
  4. Step 4: Simplify right side
    621,404.70x = 299,683,288,896.26
  5. Step 5: Solve for x
    x = 299,683,288,896.26/621,404.70
  6. Step 6: Final answer
    x = 482,267.50

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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.