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Finding the Fourth Proportional to 608,061,985.80, 912,092,978.70 and 349,781,659.80

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Solution

The fourth proportional to 608,061,985.80, 912,092,978.70 and 349,781,659.80 is: 524,672,489.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,061,985.80 : 912,092,978.70 = 349,781,659.80 : x
  2. Step 2: Convert to fraction form
    608,061,985.80/912,092,978.70 = 349,781,659.80/x
  3. Step 3: Cross multiply
    608,061,985.80x = 912,092,978.70 × 349,781,659.80
  4. Step 4: Simplify right side
    608,061,985.80x = 319,033,395,981,612,096
  5. Step 5: Solve for x
    x = 319,033,395,981,612,096/608,061,985.80
  6. Step 6: Final answer
    x = 524,672,489.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.