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Finding the Fourth Proportional to 554,822.64, 765,642.06 and 313,098.78

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Solution

The fourth proportional to 554,822.64, 765,642.06 and 313,098.78 is: 432,068.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,822.64 : 765,642.06 = 313,098.78 : x
  2. Step 2: Convert to fraction form
    554,822.64/765,642.06 = 313,098.78/x
  3. Step 3: Cross multiply
    554,822.64x = 765,642.06 × 313,098.78
  4. Step 4: Simplify right side
    554,822.64x = 239,721,594,902.69
  5. Step 5: Solve for x
    x = 239,721,594,902.69/554,822.64
  6. Step 6: Final answer
    x = 432,068.88

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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.