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Finding the Fourth Proportional to 457,390.10, 685,953.93 and 318,034.46

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Solution

The fourth proportional to 457,390.10, 685,953.93 and 318,034.46 is: 476,960.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,390.10 : 685,953.93 = 318,034.46 : x
  2. Step 2: Convert to fraction form
    457,390.10/685,953.93 = 318,034.46/x
  3. Step 3: Cross multiply
    457,390.10x = 685,953.93 × 318,034.46
  4. Step 4: Simplify right side
    457,390.10x = 218,156,987,712.43
  5. Step 5: Solve for x
    x = 218,156,987,712.43/457,390.10
  6. Step 6: Final answer
    x = 476,960.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.