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Finding the Fourth Proportional to 867,468.80, 1,300,814.40 and 393,910.40

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Solution

The fourth proportional to 867,468.80, 1,300,814.40 and 393,910.40 is: 590,689.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,468.80 : 1,300,814.40 = 393,910.40 : x
  2. Step 2: Convert to fraction form
    867,468.80/1,300,814.40 = 393,910.40/x
  3. Step 3: Cross multiply
    867,468.80x = 1,300,814.40 × 393,910.40
  4. Step 4: Simplify right side
    867,468.80x = 512,404,320,629.76
  5. Step 5: Solve for x
    x = 512,404,320,629.76/867,468.80
  6. Step 6: Final answer
    x = 590,689.05

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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.