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Finding the Fourth Proportional to 518,000.94, 714,813.56 and 285,420.66

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Solution

The fourth proportional to 518,000.94, 714,813.56 and 285,420.66 is: 393,865.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,000.94 : 714,813.56 = 285,420.66 : x
  2. Step 2: Convert to fraction form
    518,000.94/714,813.56 = 285,420.66/x
  3. Step 3: Cross multiply
    518,000.94x = 714,813.56 × 285,420.66
  4. Step 4: Simplify right side
    518,000.94x = 204,022,558,072.15
  5. Step 5: Solve for x
    x = 204,022,558,072.15/518,000.94
  6. Step 6: Final answer
    x = 393,865.23

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1.5x scale

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.