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Finding the Fourth Proportional to 611,663.40, 918,186.30 and 362,485.80

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Solution

The fourth proportional to 611,663.40, 918,186.30 and 362,485.80 is: 544,138.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,663.40 : 918,186.30 = 362,485.80 : x
  2. Step 2: Convert to fraction form
    611,663.40/918,186.30 = 362,485.80/x
  3. Step 3: Cross multiply
    611,663.40x = 918,186.30 × 362,485.80
  4. Step 4: Simplify right side
    611,663.40x = 332,829,495,504.54
  5. Step 5: Solve for x
    x = 332,829,495,504.54/611,663.40
  6. Step 6: Final answer
    x = 544,138.32

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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.