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Finding the Fourth Proportional to 554,456.77, 765,159.15 and 312,744.15

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Solution

The fourth proportional to 554,456.77, 765,159.15 and 312,744.15 is: 431,591.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,456.77 : 765,159.15 = 312,744.15 : x
  2. Step 2: Convert to fraction form
    554,456.77/765,159.15 = 312,744.15/x
  3. Step 3: Cross multiply
    554,456.77x = 765,159.15 × 312,744.15
  4. Step 4: Simplify right side
    554,456.77x = 239,299,045,168.35
  5. Step 5: Solve for x
    x = 239,299,045,168.35/554,456.77
  6. Step 6: Final answer
    x = 431,591.89

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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.