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Finding the Fourth Proportional to 1,315,695.04, 1,815,706.20 and 742,837.12

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Solution

The fourth proportional to 1,315,695.04, 1,815,706.20 and 742,837.12 is: 1,025,141.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,695.04 : 1,815,706.20 = 742,837.12 : x
  2. Step 2: Convert to fraction form
    1,315,695.04/1,815,706.20 = 742,837.12/x
  3. Step 3: Cross multiply
    1,315,695.04x = 1,815,706.20 × 742,837.12
  4. Step 4: Simplify right side
    1,315,695.04x = 1,348,773,964,374.14
  5. Step 5: Solve for x
    x = 1,348,773,964,374.14/1,315,695.04
  6. Step 6: Final answer
    x = 1,025,141.79

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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.