Home / 515,588,811.52-711,527,681.28-280,654,795.84

Finding the Fourth Proportional to 515,588,811.52, 711,527,681.28 and 280,654,795.84

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Solution

The fourth proportional to 515,588,811.52, 711,527,681.28 and 280,654,795.84 is: 387,311,849.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,588,811.52 : 711,527,681.28 = 280,654,795.84 : x
  2. Step 2: Convert to fraction form
    515,588,811.52/711,527,681.28 = 280,654,795.84/x
  3. Step 3: Cross multiply
    515,588,811.52x = 711,527,681.28 × 280,654,795.84
  4. Step 4: Simplify right side
    515,588,811.52x = 199,693,656,124,146,976
  5. Step 5: Solve for x
    x = 199,693,656,124,146,976/515,588,811.52
  6. Step 6: Final answer
    x = 387,311,849.41

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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.