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Finding the Fourth Proportional to 518,976, 778,464 and 124,992

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Solution

The fourth proportional to 518,976, 778,464 and 124,992 is: 187,488

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,976 : 778,464 = 124,992 : x
  2. Step 2: Convert to fraction form
    518,976/778,464 = 124,992/x
  3. Step 3: Cross multiply
    518,976x = 778,464 × 124,992
  4. Step 4: Simplify right side
    518,976x = 97,301,772,288
  5. Step 5: Solve for x
    x = 97,301,772,288/518,976
  6. Step 6: Final answer
    x = 187,488

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.