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Finding the Fourth Proportional to 425,871.60, 638,029.80 and 346,556.40

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Solution

The fourth proportional to 425,871.60, 638,029.80 and 346,556.40 is: 519,201.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,871.60 : 638,029.80 = 346,556.40 : x
  2. Step 2: Convert to fraction form
    425,871.60/638,029.80 = 346,556.40/x
  3. Step 3: Cross multiply
    425,871.60x = 638,029.80 × 346,556.40
  4. Step 4: Simplify right side
    425,871.60x = 221,113,310,580.72
  5. Step 5: Solve for x
    x = 221,113,310,580.72/425,871.60
  6. Step 6: Final answer
    x = 519,201.82

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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.