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Finding the Fourth Proportional to 709,246.51, 978,763.43 and 386,963.30

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Solution

The fourth proportional to 709,246.51, 978,763.43 and 386,963.30 is: 534,011.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,246.51 : 978,763.43 = 386,963.30 : x
  2. Step 2: Convert to fraction form
    709,246.51/978,763.43 = 386,963.30/x
  3. Step 3: Cross multiply
    709,246.51x = 978,763.43 × 386,963.30
  4. Step 4: Simplify right side
    709,246.51x = 378,745,526,792.12
  5. Step 5: Solve for x
    x = 378,745,526,792.12/709,246.51
  6. Step 6: Final answer
    x = 534,011.13

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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.