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Finding the Fourth Proportional to 517,513.55, 714,168.54 and 288,065.85

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Solution

The fourth proportional to 517,513.55, 714,168.54 and 288,065.85 is: 397,530.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,513.55 : 714,168.54 = 288,065.85 : x
  2. Step 2: Convert to fraction form
    517,513.55/714,168.54 = 288,065.85/x
  3. Step 3: Cross multiply
    517,513.55x = 714,168.54 × 288,065.85
  4. Step 4: Simplify right side
    517,513.55x = 205,727,567,518.36
  5. Step 5: Solve for x
    x = 205,727,567,518.36/517,513.55
  6. Step 6: Final answer
    x = 397,530.79

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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.