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Finding the Fourth Proportional to 993,900.30, 1,490,850.45 and 678,972.30

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Solution

The fourth proportional to 993,900.30, 1,490,850.45 and 678,972.30 is: 1,018,458.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,900.30 : 1,490,850.45 = 678,972.30 : x
  2. Step 2: Convert to fraction form
    993,900.30/1,490,850.45 = 678,972.30/x
  3. Step 3: Cross multiply
    993,900.30x = 1,490,850.45 × 678,972.30
  4. Step 4: Simplify right side
    993,900.30x = 1,012,246,158,992.54
  5. Step 5: Solve for x
    x = 1,012,246,158,992.54/993,900.30
  6. Step 6: Final answer
    x = 1,018,458.45

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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.