Home / 515,619,117.38-711,571,569.42-289,597,931.54

Finding the Fourth Proportional to 515,619,117.38, 711,571,569.42 and 289,597,931.54

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Solution

The fourth proportional to 515,619,117.38, 711,571,569.42 and 289,597,931.54 is: 399,654,798.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,619,117.38 : 711,571,569.42 = 289,597,931.54 : x
  2. Step 2: Convert to fraction form
    515,619,117.38/711,571,569.42 = 289,597,931.54/x
  3. Step 3: Cross multiply
    515,619,117.38x = 711,571,569.42 × 289,597,931.54
  4. Step 4: Simplify right side
    515,619,117.38x = 206,069,654,646,703,520
  5. Step 5: Solve for x
    x = 206,069,654,646,703,520/515,619,117.38
  6. Step 6: Final answer
    x = 399,654,798.86

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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.