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Finding the Fourth Proportional to 425,530.60, 638,526.30 and 188,909.80

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Solution

The fourth proportional to 425,530.60, 638,526.30 and 188,909.80 is: 283,466.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,530.60 : 638,526.30 = 188,909.80 : x
  2. Step 2: Convert to fraction form
    425,530.60/638,526.30 = 188,909.80/x
  3. Step 3: Cross multiply
    425,530.60x = 638,526.30 × 188,909.80
  4. Step 4: Simplify right side
    425,530.60x = 120,623,875,627.74
  5. Step 5: Solve for x
    x = 120,623,875,627.74/425,530.60
  6. Step 6: Final answer
    x = 283,466.98

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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.