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Finding the Fourth Proportional to 709,018.03, 978,447.92 and 386,735.04

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Solution

The fourth proportional to 709,018.03, 978,447.92 and 386,735.04 is: 533,696.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,018.03 : 978,447.92 = 386,735.04 : x
  2. Step 2: Convert to fraction form
    709,018.03/978,447.92 = 386,735.04/x
  3. Step 3: Cross multiply
    709,018.03x = 978,447.92 × 386,735.04
  4. Step 4: Simplify right side
    709,018.03x = 378,400,095,479.12
  5. Step 5: Solve for x
    x = 378,400,095,479.12/709,018.03
  6. Step 6: Final answer
    x = 533,696.01

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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.