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Finding the Fourth Proportional to 551,603.09, 761,207.73 and 309,880.57

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Solution

The fourth proportional to 551,603.09, 761,207.73 and 309,880.57 is: 427,632.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,603.09 : 761,207.73 = 309,880.57 : x
  2. Step 2: Convert to fraction form
    551,603.09/761,207.73 = 309,880.57/x
  3. Step 3: Cross multiply
    551,603.09x = 761,207.73 × 309,880.57
  4. Step 4: Simplify right side
    551,603.09x = 235,883,485,260.81
  5. Step 5: Solve for x
    x = 235,883,485,260.81/551,603.09
  6. Step 6: Final answer
    x = 427,632.64

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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.