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Finding the Fourth Proportional to 817,706.80, 1,226,564.80 and 728,164.51

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Solution

The fourth proportional to 817,706.80, 1,226,564.80 and 728,164.51 is: 1,092,250.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    817,706.80 : 1,226,564.80 = 728,164.51 : x
  2. Step 2: Convert to fraction form
    817,706.80/1,226,564.80 = 728,164.51/x
  3. Step 3: Cross multiply
    817,706.80x = 1,226,564.80 × 728,164.51
  4. Step 4: Simplify right side
    817,706.80x = 893,140,956,575.25
  5. Step 5: Solve for x
    x = 893,140,956,575.25/817,706.80
  6. Step 6: Final answer
    x = 1,092,250.86

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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.