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Finding the Fourth Proportional to 1,321,663.34, 1,823,967.50 and 748,815.14

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Solution

The fourth proportional to 1,321,663.34, 1,823,967.50 and 748,815.14 is: 1,033,405.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,663.34 : 1,823,967.50 = 748,815.14 : x
  2. Step 2: Convert to fraction form
    1,321,663.34/1,823,967.50 = 748,815.14/x
  3. Step 3: Cross multiply
    1,321,663.34x = 1,823,967.50 × 748,815.14
  4. Step 4: Simplify right side
    1,321,663.34x = 1,365,814,478,867.95
  5. Step 5: Solve for x
    x = 1,365,814,478,867.95/1,321,663.34
  6. Step 6: Final answer
    x = 1,033,405.74

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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.