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Finding the Fourth Proportional to 611,331.40, 917,688.30 and 362,153.80

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Solution

The fourth proportional to 611,331.40, 917,688.30 and 362,153.80 is: 543,640.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,331.40 : 917,688.30 = 362,153.80 : x
  2. Step 2: Convert to fraction form
    611,331.40/917,688.30 = 362,153.80/x
  3. Step 3: Cross multiply
    611,331.40x = 917,688.30 × 362,153.80
  4. Step 4: Simplify right side
    611,331.40x = 332,344,305,060.54
  5. Step 5: Solve for x
    x = 332,344,305,060.54/611,331.40
  6. Step 6: Final answer
    x = 543,640.17

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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.