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Finding the Fourth Proportional to 551,121.90, 760,495.68 and 309,349.02

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Solution

The fourth proportional to 551,121.90, 760,495.68 and 309,349.02 is: 426,872.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,121.90 : 760,495.68 = 309,349.02 : x
  2. Step 2: Convert to fraction form
    551,121.90/760,495.68 = 309,349.02/x
  3. Step 3: Cross multiply
    551,121.90x = 760,495.68 × 309,349.02
  4. Step 4: Simplify right side
    551,121.90x = 235,258,593,322.23
  5. Step 5: Solve for x
    x = 235,258,593,322.23/551,121.90
  6. Step 6: Final answer
    x = 426,872.16

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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.