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Finding the Fourth Proportional to 1,354,296.56, 1,868,917.32 and 742,438.20

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Solution

The fourth proportional to 1,354,296.56, 1,868,917.32 and 742,438.20 is: 1,024,558.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354,296.56 : 1,868,917.32 = 742,438.20 : x
  2. Step 2: Convert to fraction form
    1,354,296.56/1,868,917.32 = 742,438.20/x
  3. Step 3: Cross multiply
    1,354,296.56x = 1,868,917.32 × 742,438.20
  4. Step 4: Simplify right side
    1,354,296.56x = 1,387,555,611,009.62
  5. Step 5: Solve for x
    x = 1,387,555,611,009.62/1,354,296.56
  6. Step 6: Final answer
    x = 1,024,558.17

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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.