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Finding the Fourth Proportional to 555,003.81, 765,904.95 and 313,288.47

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Solution

The fourth proportional to 555,003.81, 765,904.95 and 313,288.47 is: 432,337.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,003.81 : 765,904.95 = 313,288.47 : x
  2. Step 2: Convert to fraction form
    555,003.81/765,904.95 = 313,288.47/x
  3. Step 3: Cross multiply
    555,003.81x = 765,904.95 × 313,288.47
  4. Step 4: Simplify right side
    555,003.81x = 239,949,189,950.93
  5. Step 5: Solve for x
    x = 239,949,189,950.93/555,003.81
  6. Step 6: Final answer
    x = 432,337.91

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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.