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Finding the Fourth Proportional to 1,321,607.80, 1,823,705.70 and 732,926.20

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Solution

The fourth proportional to 1,321,607.80, 1,823,705.70 and 732,926.20 is: 1,011,375.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,607.80 : 1,823,705.70 = 732,926.20 : x
  2. Step 2: Convert to fraction form
    1,321,607.80/1,823,705.70 = 732,926.20/x
  3. Step 3: Cross multiply
    1,321,607.80x = 1,823,705.70 × 732,926.20
  4. Step 4: Simplify right side
    1,321,607.80x = 1,336,641,688,619.34
  5. Step 5: Solve for x
    x = 1,336,641,688,619.34/1,321,607.80
  6. Step 6: Final answer
    x = 1,011,375.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.