Home / 715,451.49-987,107.73-428,867.01

Finding the Fourth Proportional to 715,451.49, 987,107.73 and 428,867.01

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Solution

The fourth proportional to 715,451.49, 987,107.73 and 428,867.01 is: 591,707.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,451.49 : 987,107.73 = 428,867.01 : x
  2. Step 2: Convert to fraction form
    715,451.49/987,107.73 = 428,867.01/x
  3. Step 3: Cross multiply
    715,451.49x = 987,107.73 × 428,867.01
  4. Step 4: Simplify right side
    715,451.49x = 423,337,940,712.99
  5. Step 5: Solve for x
    x = 423,337,940,712.99/715,451.49
  6. Step 6: Final answer
    x = 591,707.40

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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.