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Finding the Fourth Proportional to 554,449.61, 765,108.74 and 312,717.76

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Solution

The fourth proportional to 554,449.61, 765,108.74 and 312,717.76 is: 431,532.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,449.61 : 765,108.74 = 312,717.76 : x
  2. Step 2: Convert to fraction form
    554,449.61/765,108.74 = 312,717.76/x
  3. Step 3: Cross multiply
    554,449.61x = 765,108.74 × 312,717.76
  4. Step 4: Simplify right side
    554,449.61x = 239,263,092,742.94
  5. Step 5: Solve for x
    x = 239,263,092,742.94/554,449.61
  6. Step 6: Final answer
    x = 431,532.62

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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.