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Finding the Fourth Proportional to 861,321, 1,291,993.02 and 270,345

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Solution

The fourth proportional to 861,321, 1,291,993.02 and 270,345 is: 405,521.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,321 : 1,291,993.02 = 270,345 : x
  2. Step 2: Convert to fraction form
    861,321/1,291,993.02 = 270,345/x
  3. Step 3: Cross multiply
    861,321x = 1,291,993.02 × 270,345
  4. Step 4: Simplify right side
    861,321x = 349,283,852,991.90
  5. Step 5: Solve for x
    x = 349,283,852,991.90/861,321
  6. Step 6: Final answer
    x = 405,521.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.