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Finding the Fourth Proportional to 611,664.40, 918,187.80 and 362,486.80

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Solution

The fourth proportional to 611,664.40, 918,187.80 and 362,486.80 is: 544,139.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,664.40 : 918,187.80 = 362,486.80 : x
  2. Step 2: Convert to fraction form
    611,664.40/918,187.80 = 362,486.80/x
  3. Step 3: Cross multiply
    611,664.40x = 918,187.80 × 362,486.80
  4. Step 4: Simplify right side
    611,664.40x = 332,830,957,421.04
  5. Step 5: Solve for x
    x = 332,830,957,421.04/611,664.40
  6. Step 6: Final answer
    x = 544,139.82

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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.