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Finding the Fourth Proportional to 1,340,446.32, 1,849,828.31 and 728,600.52

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Solution

The fourth proportional to 1,340,446.32, 1,849,828.31 and 728,600.52 is: 1,005,475.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340,446.32 : 1,849,828.31 = 728,600.52 : x
  2. Step 2: Convert to fraction form
    1,340,446.32/1,849,828.31 = 728,600.52/x
  3. Step 3: Cross multiply
    1,340,446.32x = 1,849,828.31 × 728,600.52
  4. Step 4: Simplify right side
    1,340,446.32x = 1,347,785,868,576.72
  5. Step 5: Solve for x
    x = 1,347,785,868,576.72/1,340,446.32
  6. Step 6: Final answer
    x = 1,005,475.45

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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.