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Finding the Fourth Proportional to 1,248,938.22, 1,723,576.47 and 765,409.95

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Solution

The fourth proportional to 1,248,938.22, 1,723,576.47 and 765,409.95 is: 1,056,291.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248,938.22 : 1,723,576.47 = 765,409.95 : x
  2. Step 2: Convert to fraction form
    1,248,938.22/1,723,576.47 = 765,409.95/x
  3. Step 3: Cross multiply
    1,248,938.22x = 1,723,576.47 × 765,409.95
  4. Step 4: Simplify right side
    1,248,938.22x = 1,319,242,579,723.88
  5. Step 5: Solve for x
    x = 1,319,242,579,723.88/1,248,938.22
  6. Step 6: Final answer
    x = 1,056,291.30

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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.