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Finding the Fourth Proportional to 554,387.34, 765,053.09 and 309,369.53

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Solution

The fourth proportional to 554,387.34, 765,053.09 and 309,369.53 is: 426,929.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,387.34 : 765,053.09 = 309,369.53 : x
  2. Step 2: Convert to fraction form
    554,387.34/765,053.09 = 309,369.53/x
  3. Step 3: Cross multiply
    554,387.34x = 765,053.09 × 309,369.53
  4. Step 4: Simplify right side
    554,387.34x = 236,684,109,506.24
  5. Step 5: Solve for x
    x = 236,684,109,506.24/554,387.34
  6. Step 6: Final answer
    x = 426,929.14

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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.