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Finding the Fourth Proportional to 685,274,662.16, 945,690,534.28 and 372,008,876.02

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Solution

The fourth proportional to 685,274,662.16, 945,690,534.28 and 372,008,876.02 is: 513,378,492.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,274,662.16 : 945,690,534.28 = 372,008,876.02 : x
  2. Step 2: Convert to fraction form
    685,274,662.16/945,690,534.28 = 372,008,876.02/x
  3. Step 3: Cross multiply
    685,274,662.16x = 945,690,534.28 × 372,008,876.02
  4. Step 4: Simplify right side
    685,274,662.16x = 351,805,272,723,671,616
  5. Step 5: Solve for x
    x = 351,805,272,723,671,616/685,274,662.16
  6. Step 6: Final answer
    x = 513,378,492.08

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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.