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Finding the Fourth Proportional to 714,728.15, 986,326.29 and 388,041.54

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Solution

The fourth proportional to 714,728.15, 986,326.29 and 388,041.54 is: 535,498.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,728.15 : 986,326.29 = 388,041.54 : x
  2. Step 2: Convert to fraction form
    714,728.15/986,326.29 = 388,041.54/x
  3. Step 3: Cross multiply
    714,728.15x = 986,326.29 × 388,041.54
  4. Step 4: Simplify right side
    714,728.15x = 382,735,569,906.73
  5. Step 5: Solve for x
    x = 382,735,569,906.73/714,728.15
  6. Step 6: Final answer
    x = 535,498.10

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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.