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Finding the Fourth Proportional to 551,339.49, 760,845.62 and 309,632.25

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Solution

The fourth proportional to 551,339.49, 760,845.62 and 309,632.25 is: 427,290.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,339.49 : 760,845.62 = 309,632.25 : x
  2. Step 2: Convert to fraction form
    551,339.49/760,845.62 = 309,632.25/x
  3. Step 3: Cross multiply
    551,339.49x = 760,845.62 × 309,632.25
  4. Step 4: Simplify right side
    551,339.49x = 235,582,339,675.08
  5. Step 5: Solve for x
    x = 235,582,339,675.08/551,339.49
  6. Step 6: Final answer
    x = 427,290.89

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1.5x scale

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.