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Finding the Fourth Proportional to 387,425.07, 579,437.91 and 345,029.45

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Solution

The fourth proportional to 387,425.07, 579,437.91 and 345,029.45 is: 516,030.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,425.07 : 579,437.91 = 345,029.45 : x
  2. Step 2: Convert to fraction form
    387,425.07/579,437.91 = 345,029.45/x
  3. Step 3: Cross multiply
    387,425.07x = 579,437.91 × 345,029.45
  4. Step 4: Simplify right side
    387,425.07x = 199,923,140,499.26
  5. Step 5: Solve for x
    x = 199,923,140,499.26/387,425.07
  6. Step 6: Final answer
    x = 516,030.47

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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.