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Finding the Fourth Proportional to 554,387.59, 765,053.43 and 309,369.78

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Solution

The fourth proportional to 554,387.59, 765,053.43 and 309,369.78 is: 426,929.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,387.59 : 765,053.43 = 309,369.78 : x
  2. Step 2: Convert to fraction form
    554,387.59/765,053.43 = 309,369.78/x
  3. Step 3: Cross multiply
    554,387.59x = 765,053.43 × 309,369.78
  4. Step 4: Simplify right side
    554,387.59x = 236,684,411,327.35
  5. Step 5: Solve for x
    x = 236,684,411,327.35/554,387.59
  6. Step 6: Final answer
    x = 426,929.49

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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.