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Finding the Fourth Proportional to 425,879.60, 638,041.80 and 346,564.40

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Solution

The fourth proportional to 425,879.60, 638,041.80 and 346,564.40 is: 519,213.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,879.60 : 638,041.80 = 346,564.40 : x
  2. Step 2: Convert to fraction form
    425,879.60/638,041.80 = 346,564.40/x
  3. Step 3: Cross multiply
    425,879.60x = 638,041.80 × 346,564.40
  4. Step 4: Simplify right side
    425,879.60x = 221,122,573,591.92
  5. Step 5: Solve for x
    x = 221,122,573,591.92/425,879.60
  6. Step 6: Final answer
    x = 519,213.82

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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.