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Finding the Fourth Proportional to 554,635.76, 765,397.50 and 312,969.56

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Solution

The fourth proportional to 554,635.76, 765,397.50 and 312,969.56 is: 431,898.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,635.76 : 765,397.50 = 312,969.56 : x
  2. Step 2: Convert to fraction form
    554,635.76/765,397.50 = 312,969.56/x
  3. Step 3: Cross multiply
    554,635.76x = 765,397.50 × 312,969.56
  4. Step 4: Simplify right side
    554,635.76x = 239,546,118,800.10
  5. Step 5: Solve for x
    x = 239,546,118,800.10/554,635.76
  6. Step 6: Final answer
    x = 431,898.08

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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.