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Finding the Fourth Proportional to 1,354,617.72, 1,869,393.96 and 742,826.16

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Solution

The fourth proportional to 1,354,617.72, 1,869,393.96 and 742,826.16 is: 1,025,111.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354,617.72 : 1,869,393.96 = 742,826.16 : x
  2. Step 2: Convert to fraction form
    1,354,617.72/1,869,393.96 = 742,826.16/x
  3. Step 3: Cross multiply
    1,354,617.72x = 1,869,393.96 × 742,826.16
  4. Step 4: Simplify right side
    1,354,617.72x = 1,388,634,736,833.99
  5. Step 5: Solve for x
    x = 1,388,634,736,833.99/1,354,617.72
  6. Step 6: Final answer
    x = 1,025,111.89

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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.