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Finding the Fourth Proportional to 518,440.50, 777,966.93 and 218,901.69

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Solution

The fourth proportional to 518,440.50, 777,966.93 and 218,901.69 is: 328,481.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,440.50 : 777,966.93 = 218,901.69 : x
  2. Step 2: Convert to fraction form
    518,440.50/777,966.93 = 218,901.69/x
  3. Step 3: Cross multiply
    518,440.50x = 777,966.93 × 218,901.69
  4. Step 4: Simplify right side
    518,440.50x = 170,298,275,741.11
  5. Step 5: Solve for x
    x = 170,298,275,741.11/518,440.50
  6. Step 6: Final answer
    x = 328,481.81

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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.