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Finding the Fourth Proportional to 1,993,815.40, 2,990,723.10 and 983,421.40

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Solution

The fourth proportional to 1,993,815.40, 2,990,723.10 and 983,421.40 is: 1,475,132.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993,815.40 : 2,990,723.10 = 983,421.40 : x
  2. Step 2: Convert to fraction form
    1,993,815.40/2,990,723.10 = 983,421.40/x
  3. Step 3: Cross multiply
    1,993,815.40x = 2,990,723.10 × 983,421.40
  4. Step 4: Simplify right side
    1,993,815.40x = 2,941,141,098,014.34
  5. Step 5: Solve for x
    x = 2,941,141,098,014.34/1,993,815.40
  6. Step 6: Final answer
    x = 1,475,132.10

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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.