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Finding the Fourth Proportional to 518,419, 777,628.51 and 124,435

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Solution

The fourth proportional to 518,419, 777,628.51 and 124,435 is: 186,652.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,419 : 777,628.51 = 124,435 : x
  2. Step 2: Convert to fraction form
    518,419/777,628.51 = 124,435/x
  3. Step 3: Cross multiply
    518,419x = 777,628.51 × 124,435
  4. Step 4: Simplify right side
    518,419x = 96,764,203,641.85
  5. Step 5: Solve for x
    x = 96,764,203,641.85/518,419
  6. Step 6: Final answer
    x = 186,652.50

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1.5x scale

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.