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Finding the Fourth Proportional to 861,062.95, 1,290,894.59 and 300,491.11

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Solution

The fourth proportional to 861,062.95, 1,290,894.59 and 300,491.11 is: 450,492.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,062.95 : 1,290,894.59 = 300,491.11 : x
  2. Step 2: Convert to fraction form
    861,062.95/1,290,894.59 = 300,491.11/x
  3. Step 3: Cross multiply
    861,062.95x = 1,290,894.59 × 300,491.11
  4. Step 4: Simplify right side
    861,062.95x = 387,902,346,739.64
  5. Step 5: Solve for x
    x = 387,902,346,739.64/861,062.95
  6. Step 6: Final answer
    x = 450,492.44

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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.