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Finding the Fourth Proportional to 1,352,971.68, 1,866,998.16 and 749,346.72

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Solution

The fourth proportional to 1,352,971.68, 1,866,998.16 and 749,346.72 is: 1,034,041.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352,971.68 : 1,866,998.16 = 749,346.72 : x
  2. Step 2: Convert to fraction form
    1,352,971.68/1,866,998.16 = 749,346.72/x
  3. Step 3: Cross multiply
    1,352,971.68x = 1,866,998.16 × 749,346.72
  4. Step 4: Simplify right side
    1,352,971.68x = 1,399,028,947,442.04
  5. Step 5: Solve for x
    x = 1,399,028,947,442.04/1,352,971.68
  6. Step 6: Final answer
    x = 1,034,041.56

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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.