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Finding the Fourth Proportional to 993,902.80, 1,490,854.20 and 678,974.80

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Solution

The fourth proportional to 993,902.80, 1,490,854.20 and 678,974.80 is: 1,018,462.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,902.80 : 1,490,854.20 = 678,974.80 : x
  2. Step 2: Convert to fraction form
    993,902.80/1,490,854.20 = 678,974.80/x
  3. Step 3: Cross multiply
    993,902.80x = 1,490,854.20 × 678,974.80
  4. Step 4: Simplify right side
    993,902.80x = 1,012,252,432,274.16
  5. Step 5: Solve for x
    x = 1,012,252,432,274.16/993,902.80
  6. Step 6: Final answer
    x = 1,018,462.20

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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.