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Finding the Fourth Proportional to 554,663.37, 765,369.61 and 312,931.83

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Solution

The fourth proportional to 554,663.37, 765,369.61 and 312,931.83 is: 431,808.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,663.37 : 765,369.61 = 312,931.83 : x
  2. Step 2: Convert to fraction form
    554,663.37/765,369.61 = 312,931.83/x
  3. Step 3: Cross multiply
    554,663.37x = 765,369.61 × 312,931.83
  4. Step 4: Simplify right side
    554,663.37x = 239,508,512,683.69
  5. Step 5: Solve for x
    x = 239,508,512,683.69/554,663.37
  6. Step 6: Final answer
    x = 431,808.78

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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.