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Finding the Fourth Proportional to 515,392.24, 711,240.60 and 289,035.76

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Solution

The fourth proportional to 515,392.24, 711,240.60 and 289,035.76 is: 398,868.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,392.24 : 711,240.60 = 289,035.76 : x
  2. Step 2: Convert to fraction form
    515,392.24/711,240.60 = 289,035.76/x
  3. Step 3: Cross multiply
    515,392.24x = 711,240.60 × 289,035.76
  4. Step 4: Simplify right side
    515,392.24x = 205,573,967,363.86
  5. Step 5: Solve for x
    x = 205,573,967,363.86/515,392.24
  6. Step 6: Final answer
    x = 398,868.96

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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.