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Finding the Fourth Proportional to 554,560.15, 765,328.44 and 312,754.49

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Solution

The fourth proportional to 554,560.15, 765,328.44 and 312,754.49 is: 431,621.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,560.15 : 765,328.44 = 312,754.49 : x
  2. Step 2: Convert to fraction form
    554,560.15/765,328.44 = 312,754.49/x
  3. Step 3: Cross multiply
    554,560.15x = 765,328.44 × 312,754.49
  4. Step 4: Simplify right side
    554,560.15x = 239,359,904,370.92
  5. Step 5: Solve for x
    x = 239,359,904,370.92/554,560.15
  6. Step 6: Final answer
    x = 431,621.18

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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.