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Finding the Fourth Proportional to 423,067.20, 634,600.80 and 393,542.70

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Solution

The fourth proportional to 423,067.20, 634,600.80 and 393,542.70 is: 590,314.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,067.20 : 634,600.80 = 393,542.70 : x
  2. Step 2: Convert to fraction form
    423,067.20/634,600.80 = 393,542.70/x
  3. Step 3: Cross multiply
    423,067.20x = 634,600.80 × 393,542.70
  4. Step 4: Simplify right side
    423,067.20x = 249,742,512,254.16
  5. Step 5: Solve for x
    x = 249,742,512,254.16/423,067.20
  6. Step 6: Final answer
    x = 590,314.05

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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.