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Finding the Fourth Proportional to 640,024.40, 883,236.69 and 349,640.01

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Solution

The fourth proportional to 640,024.40, 883,236.69 and 349,640.01 is: 482,504.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,024.40 : 883,236.69 = 349,640.01 : x
  2. Step 2: Convert to fraction form
    640,024.40/883,236.69 = 349,640.01/x
  3. Step 3: Cross multiply
    640,024.40x = 883,236.69 × 349,640.01
  4. Step 4: Simplify right side
    640,024.40x = 308,814,885,123.97
  5. Step 5: Solve for x
    x = 308,814,885,123.97/640,024.40
  6. Step 6: Final answer
    x = 482,504.86

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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.