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Finding the Fourth Proportional to 554,370.72, 764,985.75 and 312,712.68

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Solution

The fourth proportional to 554,370.72, 764,985.75 and 312,712.68 is: 431,517.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,370.72 : 764,985.75 = 312,712.68 : x
  2. Step 2: Convert to fraction form
    554,370.72/764,985.75 = 312,712.68/x
  3. Step 3: Cross multiply
    554,370.72x = 764,985.75 × 312,712.68
  4. Step 4: Simplify right side
    554,370.72x = 239,220,744,044.31
  5. Step 5: Solve for x
    x = 239,220,744,044.31/554,370.72
  6. Step 6: Final answer
    x = 431,517.64

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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.