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Finding the Fourth Proportional to 820,991.88, 1,132,988.04 and 458,403.48

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Solution

The fourth proportional to 820,991.88, 1,132,988.04 and 458,403.48 is: 632,607.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,991.88 : 1,132,988.04 = 458,403.48 : x
  2. Step 2: Convert to fraction form
    820,991.88/1,132,988.04 = 458,403.48/x
  3. Step 3: Cross multiply
    820,991.88x = 1,132,988.04 × 458,403.48
  4. Step 4: Simplify right side
    820,991.88x = 519,365,660,334.38
  5. Step 5: Solve for x
    x = 519,365,660,334.38/820,991.88
  6. Step 6: Final answer
    x = 632,607.55

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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.