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Finding the Fourth Proportional to 551,362.55, 760,920.68 and 309,659.36

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Solution

The fourth proportional to 551,362.55, 760,920.68 and 309,659.36 is: 427,352.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,362.55 : 760,920.68 = 309,659.36 : x
  2. Step 2: Convert to fraction form
    551,362.55/760,920.68 = 309,659.36/x
  3. Step 3: Cross multiply
    551,362.55x = 760,920.68 × 309,659.36
  4. Step 4: Simplify right side
    551,362.55x = 235,626,207,749.11
  5. Step 5: Solve for x
    x = 235,626,207,749.11/551,362.55
  6. Step 6: Final answer
    x = 427,352.58

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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.