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Finding the Fourth Proportional to 375,561.99, 517,973.94 and 330,143.40

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Solution

The fourth proportional to 375,561.99, 517,973.94 and 330,143.40 is: 455,332.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    375,561.99 : 517,973.94 = 330,143.40 : x
  2. Step 2: Convert to fraction form
    375,561.99/517,973.94 = 330,143.40/x
  3. Step 3: Cross multiply
    375,561.99x = 517,973.94 × 330,143.40
  4. Step 4: Simplify right side
    375,561.99x = 171,005,677,663.00
  5. Step 5: Solve for x
    x = 171,005,677,663.00/375,561.99
  6. Step 6: Final answer
    x = 455,332.76

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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.