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Finding the Fourth Proportional to 554,663.88, 765,370.29 and 312,932.34

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Solution

The fourth proportional to 554,663.88, 765,370.29 and 312,932.34 is: 431,809.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,663.88 : 765,370.29 = 312,932.34 : x
  2. Step 2: Convert to fraction form
    554,663.88/765,370.29 = 312,932.34/x
  3. Step 3: Cross multiply
    554,663.88x = 765,370.29 × 312,932.34
  4. Step 4: Simplify right side
    554,663.88x = 239,509,115,816.18
  5. Step 5: Solve for x
    x = 239,509,115,816.18/554,663.88
  6. Step 6: Final answer
    x = 431,809.47

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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.