Home / 715,314.41-987,130.89-393,023.51

Finding the Fourth Proportional to 715,314.41, 987,130.89 and 393,023.51

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Solution

The fourth proportional to 715,314.41, 987,130.89 and 393,023.51 is: 542,370.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,314.41 : 987,130.89 = 393,023.51 : x
  2. Step 2: Convert to fraction form
    715,314.41/987,130.89 = 393,023.51/x
  3. Step 3: Cross multiply
    715,314.41x = 987,130.89 × 393,023.51
  4. Step 4: Simplify right side
    715,314.41x = 387,965,642,281.57
  5. Step 5: Solve for x
    x = 387,965,642,281.57/715,314.41
  6. Step 6: Final answer
    x = 542,370.79

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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.