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Finding the Fourth Proportional to 554,495.94, 765,215.46 and 312,731.10

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Solution

The fourth proportional to 554,495.94, 765,215.46 and 312,731.10 is: 431,575.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,495.94 : 765,215.46 = 312,731.10 : x
  2. Step 2: Convert to fraction form
    554,495.94/765,215.46 = 312,731.10/x
  3. Step 3: Cross multiply
    554,495.94x = 765,215.46 × 312,731.10
  4. Step 4: Simplify right side
    554,495.94x = 239,306,672,542.81
  5. Step 5: Solve for x
    x = 239,306,672,542.81/554,495.94
  6. Step 6: Final answer
    x = 431,575.16

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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.