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Finding the Fourth Proportional to 1,345,816.80, 2,019,826.80 and 1,335,319.20

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Solution

The fourth proportional to 1,345,816.80, 2,019,826.80 and 1,335,319.20 is: 2,004,071.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345,816.80 : 2,019,826.80 = 1,335,319.20 : x
  2. Step 2: Convert to fraction form
    1,345,816.80/2,019,826.80 = 1,335,319.20/x
  3. Step 3: Cross multiply
    1,345,816.80x = 2,019,826.80 × 1,335,319.20
  4. Step 4: Simplify right side
    1,345,816.80x = 2,697,113,506,714.56
  5. Step 5: Solve for x
    x = 2,697,113,506,714.56/1,345,816.80
  6. Step 6: Final answer
    x = 2,004,071.81

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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.