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Finding the Fourth Proportional to 1,345,449.60, 2,015,890.60 and 811,849.40

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Solution

The fourth proportional to 1,345,449.60, 2,015,890.60 and 811,849.40 is: 1,216,396.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345,449.60 : 2,015,890.60 = 811,849.40 : x
  2. Step 2: Convert to fraction form
    1,345,449.60/2,015,890.60 = 811,849.40/x
  3. Step 3: Cross multiply
    1,345,449.60x = 2,015,890.60 × 811,849.40
  4. Step 4: Simplify right side
    1,345,449.60x = 1,636,599,574,075.64
  5. Step 5: Solve for x
    x = 1,636,599,574,075.64/1,345,449.60
  6. Step 6: Final answer
    x = 1,216,396.05

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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.