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Finding the Fourth Proportional to 790,216.85, 1,090,499.12 and 427,640.71

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Solution

The fourth proportional to 790,216.85, 1,090,499.12 and 427,640.71 is: 590,144.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,216.85 : 1,090,499.12 = 427,640.71 : x
  2. Step 2: Convert to fraction form
    790,216.85/1,090,499.12 = 427,640.71/x
  3. Step 3: Cross multiply
    790,216.85x = 1,090,499.12 × 427,640.71
  4. Step 4: Simplify right side
    790,216.85x = 466,341,816,274.03
  5. Step 5: Solve for x
    x = 466,341,816,274.03/790,216.85
  6. Step 6: Final answer
    x = 590,144.10

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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.