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Finding the Fourth Proportional to 656,832.69, 906,428.61 and 355,026.69

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Solution

The fourth proportional to 656,832.69, 906,428.61 and 355,026.69 is: 489,936.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,832.69 : 906,428.61 = 355,026.69 : x
  2. Step 2: Convert to fraction form
    656,832.69/906,428.61 = 355,026.69/x
  3. Step 3: Cross multiply
    656,832.69x = 906,428.61 × 355,026.69
  4. Step 4: Simplify right side
    656,832.69x = 321,806,349,129.60
  5. Step 5: Solve for x
    x = 321,806,349,129.60/656,832.69
  6. Step 6: Final answer
    x = 489,936.56

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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.