Home / 515,619,456.38-711,572,037.15-289,598,270.30

Finding the Fourth Proportional to 515,619,456.38, 711,572,037.15 and 289,598,270.30

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Solution

The fourth proportional to 515,619,456.38, 711,572,037.15 and 289,598,270.30 is: 399,655,266.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,619,456.38 : 711,572,037.15 = 289,598,270.30 : x
  2. Step 2: Convert to fraction form
    515,619,456.38/711,572,037.15 = 289,598,270.30/x
  3. Step 3: Cross multiply
    515,619,456.38x = 711,572,037.15 × 289,598,270.30
  4. Step 4: Simplify right side
    515,619,456.38x = 206,070,031,152,487,328
  5. Step 5: Solve for x
    x = 206,070,031,152,487,328/515,619,456.38
  6. Step 6: Final answer
    x = 399,655,266.31

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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.