Home / 715,433.38-987,303.47-388,749.51

Finding the Fourth Proportional to 715,433.38, 987,303.47 and 388,749.51

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Solution

The fourth proportional to 715,433.38, 987,303.47 and 388,749.51 is: 536,477.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,433.38 : 987,303.47 = 388,749.51 : x
  2. Step 2: Convert to fraction form
    715,433.38/987,303.47 = 388,749.51/x
  3. Step 3: Cross multiply
    715,433.38x = 987,303.47 × 388,749.51
  4. Step 4: Simplify right side
    715,433.38x = 383,813,738,240.05
  5. Step 5: Solve for x
    x = 383,813,738,240.05/715,433.38
  6. Step 6: Final answer
    x = 536,477.26

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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.