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Finding the Fourth Proportional to 714,269.99, 985,661.58 and 391,985.47

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Solution

The fourth proportional to 714,269.99, 985,661.58 and 391,985.47 is: 540,922.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,269.99 : 985,661.58 = 391,985.47 : x
  2. Step 2: Convert to fraction form
    714,269.99/985,661.58 = 391,985.47/x
  3. Step 3: Cross multiply
    714,269.99x = 985,661.58 × 391,985.47
  4. Step 4: Simplify right side
    714,269.99x = 386,365,015,233.09
  5. Step 5: Solve for x
    x = 386,365,015,233.09/714,269.99
  6. Step 6: Final answer
    x = 540,922.93

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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.