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Finding the Fourth Proportional to 709,021.02, 978,452.06 and 386,738.04

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Solution

The fourth proportional to 709,021.02, 978,452.06 and 386,738.04 is: 533,700.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,021.02 : 978,452.06 = 386,738.04 : x
  2. Step 2: Convert to fraction form
    709,021.02/978,452.06 = 386,738.04/x
  3. Step 3: Cross multiply
    709,021.02x = 978,452.06 × 386,738.04
  4. Step 4: Simplify right side
    709,021.02x = 378,404,631,918.36
  5. Step 5: Solve for x
    x = 378,404,631,918.36/709,021.02
  6. Step 6: Final answer
    x = 533,700.16

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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.