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Finding the Fourth Proportional to 1,286,574.24, 1,775,553 and 742,809.72

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Solution

The fourth proportional to 1,286,574.24, 1,775,553 and 742,809.72 is: 1,025,123.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,574.24 : 1,775,553 = 742,809.72 : x
  2. Step 2: Convert to fraction form
    1,286,574.24/1,775,553 = 742,809.72/x
  3. Step 3: Cross multiply
    1,286,574.24x = 1,775,553 × 742,809.72
  4. Step 4: Simplify right side
    1,286,574.24x = 1,318,898,026,775.16
  5. Step 5: Solve for x
    x = 1,318,898,026,775.16/1,286,574.24
  6. Step 6: Final answer
    x = 1,025,123.92

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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.