Home / 715,036.77-986,757.84-388,356.15

Finding the Fourth Proportional to 715,036.77, 986,757.84 and 388,356.15

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Solution

The fourth proportional to 715,036.77, 986,757.84 and 388,356.15 is: 535,935.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,036.77 : 986,757.84 = 388,356.15 : x
  2. Step 2: Convert to fraction form
    715,036.77/986,757.84 = 388,356.15/x
  3. Step 3: Cross multiply
    715,036.77x = 986,757.84 × 388,356.15
  4. Step 4: Simplify right side
    715,036.77x = 383,213,475,724.72
  5. Step 5: Solve for x
    x = 383,213,475,724.72/715,036.77
  6. Step 6: Final answer
    x = 535,935.34

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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.