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Finding the Fourth Proportional to 612,005.80, 918,008.70 and 191,410.60

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Solution

The fourth proportional to 612,005.80, 918,008.70 and 191,410.60 is: 287,115.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,005.80 : 918,008.70 = 191,410.60 : x
  2. Step 2: Convert to fraction form
    612,005.80/918,008.70 = 191,410.60/x
  3. Step 3: Cross multiply
    612,005.80x = 918,008.70 × 191,410.60
  4. Step 4: Simplify right side
    612,005.80x = 175,716,596,072.22
  5. Step 5: Solve for x
    x = 175,716,596,072.22/612,005.80
  6. Step 6: Final answer
    x = 287,115.90

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