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Finding the Fourth Proportional to 817,486.80, 1,228,303.80 and 726,248.40

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Solution

The fourth proportional to 817,486.80, 1,228,303.80 and 726,248.40 is: 1,091,214.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,486.80 : 1,228,303.80 = 726,248.40 : x
  2. Step 2: Convert to fraction form
    817,486.80/1,228,303.80 = 726,248.40/x
  3. Step 3: Cross multiply
    817,486.80x = 1,228,303.80 × 726,248.40
  4. Step 4: Simplify right side
    817,486.80x = 892,053,669,463.92
  5. Step 5: Solve for x
    x = 892,053,669,463.92/817,486.80
  6. Step 6: Final answer
    x = 1,091,214.77

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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.