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Finding the Fourth Proportional to 657,038.44, 906,711.78 and 355,231.72

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Solution

The fourth proportional to 657,038.44, 906,711.78 and 355,231.72 is: 490,219.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,038.44 : 906,711.78 = 355,231.72 : x
  2. Step 2: Convert to fraction form
    657,038.44/906,711.78 = 355,231.72/x
  3. Step 3: Cross multiply
    657,038.44x = 906,711.78 × 355,231.72
  4. Step 4: Simplify right side
    657,038.44x = 322,092,785,153.66
  5. Step 5: Solve for x
    x = 322,092,785,153.66/657,038.44
  6. Step 6: Final answer
    x = 490,219.09

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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.