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Finding the Fourth Proportional to 518,414, 777,621 and 124,430

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Solution

The fourth proportional to 518,414, 777,621 and 124,430 is: 186,645

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,414 : 777,621 = 124,430 : x
  2. Step 2: Convert to fraction form
    518,414/777,621 = 124,430/x
  3. Step 3: Cross multiply
    518,414x = 777,621 × 124,430
  4. Step 4: Simplify right side
    518,414x = 96,759,381,030
  5. Step 5: Solve for x
    x = 96,759,381,030/518,414
  6. Step 6: Final answer
    x = 186,645

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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.