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Finding the Fourth Proportional to 657,908.73, 908,064 and 428,060.51

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Solution

The fourth proportional to 657,908.73, 908,064 and 428,060.51 is: 590,821.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,908.73 : 908,064 = 428,060.51 : x
  2. Step 2: Convert to fraction form
    657,908.73/908,064 = 428,060.51/x
  3. Step 3: Cross multiply
    657,908.73x = 908,064 × 428,060.51
  4. Step 4: Simplify right side
    657,908.73x = 388,706,334,412.32
  5. Step 5: Solve for x
    x = 388,706,334,412.32/657,908.73
  6. Step 6: Final answer
    x = 590,821.06

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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.